Behavioural weight-loss treatment

1. Introduction

Version followed: adults — the Diabetes Prevention Program (DPP) "Lifestyle Balance" protocol (1996 Manual of Operations, University of Pittsburgh Lifestyle Resource Core; DPP Research Group 2002 description), with the Look AHEAD Intensive Lifestyle Intervention noted where it differs; children — Epstein's family-based behavioural treatment (FBT) as specified in the 2017–2021 pediatric primary-care trial protocol (NCT02873715). Where the posted DPP manual offers "activity-first" and "weight-first" session orders, the weight-first order is used.

Behavioural weight-loss treatment is a programme family, not a single psychotherapy: a structured, multicomponent lifestyle intervention combining modest dietary change, graded physical activity and behaviour-therapy skills, usually delivered by a multidisciplinary team (dietitians, psychologists, exercise staff, lay "lifestyle coaches"). Its change model is operant and behaviour-analytic: excess intake and inactivity are treated as observable, measurable behaviour chains maintained by cues and consequences; change comes from making those chains visible (self-monitoring, functional analysis), rearranging antecedents (stimulus control), strengthening reinforcement for new habits (feedback, praise, contracts), and teaching problem solving and lapse recovery so the new behaviour persists after contact ends. Richard Stuart's 1967 paper framed overeating as a behavioural excess to be analysed and changed via its "chains of eating-related behaviors"; he later added that negative moods often precede problem eating, so lifestyle and mood patterns need attention too. In children, parents are the main agents of change and the whole household environment is the target. [source: DPP Research Group 2002; DPP MOP §1; Stuart 1983 Citation Classic commentary; PLAN/FBT protocol; USPSTF 2018, 2024]

Note on numbers: under this guide's house rules, protocol-specified calorie, weight-loss and activity targets are deliberately not reproduced. Take them from the manual you are delivering and from the medical clinician responsible for the patient. [synthesis]

2. Framework

Adult programme (DPP Lifestyle Balance) [source: DPP Research Group 2002; DPP MOP §7]

Phase 0 – Screening and set-up. Medical clearance (the DPP required an exercise tolerance test for higher cardiovascular-risk participants before activity was increased); baseline weight; agree personal goals; issue self-monitoring materials and, if needed, a home scale. Screen for eating disorders, current depression and other conditions that make a calorie-reduction programme inappropriate [synthesis, modelled on the FBT protocol's screening].
Phase 1 – Core curriculum. 16 structured sessions completed within 24 weeks; 30–60 minutes; individual delivery with one lifestyle coach per participant in the DPP (group delivery is the norm in later translations such as Group Lifestyle Balance and the CDC National DPP). Each session: private weigh-in → review of self-monitoring records → new topic from participant worksheets → goal setting and home activities. Goal: reach the programme's weight and activity goals over roughly the first six months. Session order (weight-first): 1 Welcome; 2 Be a Fat Detective; 3 Three Ways to Eat Less Fat; 4 Healthy Eating; 5 Move Those Muscles; 6 Being Active: A Way of Life; 7 Tip the Calorie Balance; 8 Take Charge of What's Around You; 9 Problem Solving; 10 Four Keys to Healthy Eating Out; 11 Talk Back to Negative Thoughts; 12 The Slippery Slope of Lifestyle Change; 13 Jump Start Your Activity Plan; 14 Make Social Cues Work for You; 15 You Can Manage Stress; 16 Ways to Stay Motivated.
Phase 2 – After-core / maintenance. Face-to-face contact at least every two months plus a phone contact between, often more frequent; shorter, less structured sessions with topics chosen by need; self-monitoring one week per month; optional structured meal plans or meal replacements; group courses (activity, behavioural/motivational, healthy eating) and three to four motivational campaigns per year; supervised activity sessions offered at least twice weekly throughout.
Look AHEAD variant (more intensive; for adults with type 2 diabetes): year 1 mixes two to three group sessions and one individual session a month, with meal replacements used heavily in the early months then tapered; years 2–4 one individual visit plus one phone/email contact a month, with 6–8-week refresher groups or campaigns two to three times a year. [source: NASEM Look AHEAD slides; full Wadden 2006 description not drawn on — [uncertain] for further detail]
Typical dose (USPSTF evidence base): most programmes run one to two years with 12 or more sessions in year 1; group medians about 23 sessions, individual medians about 12; group sessions 1–2 hours; about a third use a 3–12-month core followed by 9–12 months of maintenance. [source: USPSTF 2018]
Moving between phases: pacing is one new topic per meeting, but a participant struggling with a topic may stay on it for an extra meeting; all core sessions must be completed within 24 weeks. Not meeting goals does not stop progression; it triggers the toolbox (see 4.19). Participants who had lost under 3% of starting weight by session 8, or who slip after the core, were flagged as priorities for intensified attention. [source: DPP MOP §7; DPP Toolbox App. G]

Paediatric programme (Epstein FBT, primary-care version) [source: PLAN/FBT protocol; USPSTF 2024; NHLBI evidence table]

Format: child and at least one parent; both weighed, then a 30–60-minute family meeting with a trained coach; individual family sessions in the primary-care protocol, while older Epstein trials used parent and child groups (sometimes concurrent, separate). USPSTF requires at least 26 contact hours for children aged 6 and over; effective programmes often included supervised activity sessions.
Session sequence: weigh-in → review habit books and checklists → feedback on skills, weight goals and level progression → diet/activity education unit → behaviour-change technique → weekly behavioural goals → barrier problem solving.
Content stages: five content areas in order — individual diet and activity change; family changes; peer networks; community; relapse prevention.
Frequency and progression (mastery-based): weekly at first, stepping down to biweekly, monthly, then quarterly. Step down requires both parent and child to meet weight goals for two consecutive weeks; regain steps frequency back up. Advance a unit when behavioural goals are met on at least five of seven days for two consecutive sessions and the unit quiz is passed at 80% or above (else remediation and re-quiz). After maintenance goals hold for about six months, move to quarterly sessions; families who cannot maintain go back to weekly. Roughly 26–96 sessions over two years. Older Epstein schedules: 8–26 weekly meetings then monthly maintenance for 6–12 months.

3. Guiding principles

Behaviour, not willpower, is the target. Analyse and change specific, observable eating and activity behaviours and their cues and consequences; never attribute lapses to character. [source: Stuart 1983; DPP 2002]
Goals are means, not ends. Fat and calorie goals exist to produce weight change; adjust them if they don't. [source: DPP 2002]
Measure everything you discuss. Weight, intake and activity are recorded and reviewed every session; decisions rest on the record. [source: DPP 2002; DPP MOP §7]
Small, stepped change. Start with one dietary target (e.g. fat), then add calorie balance; increase activity gradually. [source: DPP 2002]
A common protocol, individualised delivery. Everyone gets the same core; pace, examples, tools and cultural content flex to the person. [source: DPP MOP §1]
Least-costly effective tool first. When goals are missed, try the simplest adherence strategy before more intensive ones. [source: DPP Toolbox App. G]
Retention beats adherence. No adherence push should cost you the participant; adjust demands before they drop out. [source: DPP Toolbox App. G; PLAN/FBT protocol]
Barriers are data. Don't presume a barrier before it appears; when one does, treat it as information for a better "experiment", not failure. [source: DPP MOP §7]
Lapses are expected. Teach that slips are normal and the skill is getting back on track quickly. [source: DPP 2002]
Collaboration. The participant helps set goals and generate solutions; the coach does not prescribe alone. [source: DPP MOP §7]
Positive reinforcement over criticism. Comments on records highlight positive changes first; rewards are tailored so they actually reinforce, and never shame. [source: DPP MOP §7; DPP Toolbox App. G]
Parents as agents of change (children). Parents change their own eating and activity, model it, praise, and reshape the home; avoid "acting like the food police" (Epstein, cited in UB 2026). [source: PLAN/FBT protocol; UB news 2026]
Treat the shared environment and the whole family. Household food and activity cues are changed for everyone, not just the index child. [source: UB Traffic Light page; UB news 2026]
Mastery before progression (children). Advance content and step down contact only when skills and goals are demonstrably met. [source: PLAN/FBT protocol]
Build a supportive ecology for maintenance. Extend change from the individual to family, peers and community resources. [source: PLAN/FBT protocol]
Weight-neutral respect. Private weigh-ins, no shaming language, watch for disordered eating and stigma. [source: DPP MOP §7 (private weighing); USPSTF 2018/2024 (harms monitored); synthesis]

4. Intervention inventory

Adult components 4.1–4.21 follow the DPP core curriculum and toolbox (with Look AHEAD noted); paediatric FBT components are 4.22–4.31. Session worksheets are the programme's own copyrighted or licensed materials; the steps below are paraphrased. All example language is illustrative unless marked as a quote. [source: DPP MOP §7; DPP Research Group 2002; PLAN/FBT protocol]

4.1 Orientation and collaborative goal setting (Session 1)

Purpose / when: first session; establishes programme goals, the logic of small steps, and the self-monitoring commitment.
Steps: (1) Explain the two programme goals (weight and activity) as the protocol states them, and the rationale that modest loss plus activity improves health. (2) Elicit the person's own reasons and values for joining; write them down. (3) Describe the structure: core sessions, weigh-ins, records, maintenance. (4) Agree the first home task (usually starting a food and weight record). (5) Ask what might get in the way; note it but don't solve everything yet.
Example language (illustrative): "This programme isn't a diet you go on and come off. Over the next few months you'll make a handful of changes, test them, and keep the ones that work for your life."
Watch for: expectations of rapid or large loss; previous dieting history and any binge or purging pattern (screen, see 5.9); whether goals are the person's or a doctor's.

4.2 Private weigh-in and weight graph

Purpose / when: every session from the start of weight-focused sessions; gives objective, regular feedback.
Steps: (1) Weigh privately, light indoor clothes, no shoes, same scale. (2) Record on the data form and the participant's own weight graph; encourage them to plot it. (3) Link the change to last week's records ("what did you do that might explain this?"). (4) Normalise fluctuation; focus on the trend across weeks.
Example language (illustrative): "Let's look at the line rather than today's dot. What was different in the weeks where it went down?"
Watch for: distress or avoidance around weighing; very rapid loss (refer to the medical team); a participant skipping sessions on "bad" weeks.
[source: DPP MOP §7; DPP 2002]

4.3 Food self-monitoring ("Be a Fat Detective"; later calories)

Purpose / when: core sessions onward; makes intake visible and is the backbone of all later problem solving.
Steps: (1) Provide a pocket record booklet, a fat-and-calorie counter, measuring cups/spoons and a food scale. (2) Teach recording everything eaten and drunk, as soon as possible after eating, with amounts. (3) Practise estimating portions with real measures. (4) Start with fat grams only; add calories once fat recording is reliable ("Tip the Calorie Balance"). (5) Total each day against the person's goal. (6) After the core, self-monitor at least one week a month.
Example language (illustrative): "You don't need to be perfect. A rough record of everything beats a perfect record of half your day."
Watch for: missing items (cooking fats, drinks, cream in coffee), under-reported portions, records written retrospectively; if intake looks low but weight isn't moving, check accuracy before changing goals. Simplified methods exist for low literacy or numeracy (the DPP's "Quick Track" and "Count 100").
[source: DPP 2002; DPP MOP §7]

4.4 Activity self-monitoring

Purpose / when: from the first activity session; tracks progress to the activity goal.
Steps: (1) Record minutes of moderate activity daily (type and duration). (2) Optionally add pedometer step counts. (3) Total weekly; compare with the week's goal; graph.
Example language (illustrative): "Write down the minutes the same way you write down food: right after, while you remember."
Watch for: counting incidental movement as planned activity; drop-off in recording when activity drops. Swap to alternate tracking tools from the activity toolbox if recording stalls.
[source: DPP 2002; DPP MOP §7]

4.5 Home self-weighing

Purpose / when: throughout; extends feedback between sessions.
Steps: (1) Provide a scale if needed. (2) Agree a frequency (the DPP encouraged daily, or at least weekly). (3) Same time, same conditions; record the number. (4) Agree an action if weight rises past a personally agreed band (see 4.14).
Example language (illustrative): "The scale is information, not a verdict. What would you do differently if it went up two weeks in a row?"
Watch for: compulsive weighing or mood swings tied to the scale; reduce frequency if so [synthesis].
[source: DPP 2002]

4.6 Record review and written feedback

Purpose / when: every session; reinforces monitoring and identifies problems.
Steps: (1) Review records briefly in session; note summary data. (2) Afterwards, review fully and write comments that first highlight positive changes, then suggest one problem to solve. (3) Return comments by post or at the next visit.
Example language (illustrative, written): "Great job recording every day this week. I noticed afternoons look harder than mornings — let's talk about that next time."
Watch for: records not returned (an early warning of disengagement); feedback that sounds like grading.
[source: DPP MOP §7]

4.7 Stepped dietary change: fat reduction, healthy eating, calorie balance ("Three Ways to Eat Less Fat", "Healthy Eating", "Tip the Calorie Balance")

Purpose / when: core sessions 2–4 and 7.
Steps: (1) From records, identify the top sources of fat. (2) Teach three routes: eat high-fat foods less often, eat smaller amounts, substitute lower-fat alternatives; choose lower-fat preparation methods. (3) Introduce balanced meals and regular meal pattern. (4) Explain energy balance: weight changes when intake and expenditure differ; add a daily calorie goal set by the protocol according to starting weight. (5) Pick one or two concrete swaps for the week.
Example language (illustrative): "Looking at your record, three foods account for most of your fat. Which one would be easiest to swap or shrink this week?"
Watch for: rigid all-or-nothing rules ("never" foods) that set up lapses; culturally irrelevant examples (use the person's own foods).
[source: DPP MOP §7; DPP 2002]

4.8 Structured meal plans and meal replacements

Purpose / when: Look AHEAD used meal replacements heavily in the first months and then tapered; the DPP offered structured meal plans and replacements as optional tools in maintenance and restarts.
Steps: (1) Offer as an option, not a requirement. (2) Replace specified meals/snacks with portion-controlled products or follow a set menu plan. (3) Keep recording. (4) Plan the taper back to self-selected food with the same portion awareness.
Example language (illustrative): "Some people find it easier to take decisions out of a couple of meals a day for a while. Want to try it for a month and see?"
Watch for: cost; inability to transition off; regain on stopping.
[source: DPP 2002; NASEM Look AHEAD slides; DPP Toolbox App. G — detail [uncertain] for Look AHEAD]

4.9 Graduated physical activity ("Move Those Muscles", "Being Active: A Way of Life", "Jump Start Your Activity Plan") and supervised sessions

Purpose / when: core sessions 5, 6 and 13; continuing.
Steps: (1) Obtain medical clearance where risk is raised. (2) Choose activities equal to brisk walking that the person likes. (3) Build up gradually from current level in small weekly increments toward the protocol goal; strength training can count for part. (4) Schedule specific times and places; record. (5) Add lifestyle activity (stairs, walking errands). (6) In session 13, refresh with new activities, aerobic intensity and fitness ideas. (7) Offer supervised group walks/classes at least twice a week.
Example language (illustrative): "Let's pick days and times now. Where will you be, and what will you do if it rains?"
Watch for: pain or injury (USPSTF notes mixed musculoskeletal findings); boredom; all-or-nothing increases.
[source: DPP 2002; DPP MOP §7; USPSTF 2018]

4.10 Functional analysis of eating chains (ABC)

Purpose / when: whenever a recurring problem eating episode appears; the conceptual root of the method.
Steps: (1) Pick one episode from the record. (2) Map antecedents (time, place, mood, people, sight of food), the behaviour (what and how much), and consequences (relief, guilt). (3) Identify the earliest link where a change is feasible. (4) Plan a change to that link and test it.
Example language (illustrative): "Let's walk back from the moment you were eating the biscuits. What happened just before? And before that?"
Watch for: negative mood as a frequent antecedent — Stuart's later work points to addressing lifestyle and mood patterns, not only the eating.
[source: Stuart 1983 commentary ("identification and change of chains"); NASEM slides (ABCs); step format is synthesis]

4.11 Stimulus control ("Take Charge of What's Around You")

Purpose / when: core session 8; whenever cues drive eating or inactivity.
Steps: (1) From records, list cues to unplanned eating (food on view, eating while watching TV, shopping hungry) and cues for activity. (2) Remove or hide problem foods; keep healthier foods visible. (3) Limit eating to designated places and times without other activities [content of this session paraphrased from standard behavioural practice; manual worksheet not drawn on — uncertain]. (4) Add positive cues for activity (shoes by the door, scheduled walks). (5) Shop from a list, not hungry.
Example language (illustrative): "What's in sight when you walk into the kitchen? What would you like to see there instead?"
Watch for: household members' resistance — bring in 4.15.
[source: DPP 2002 (stimulus control in sessions 1–8); detail [uncertain]]

4.12 Five-step problem solving ("Problem Solving")

Purpose / when: core session 9, then used for any eating or activity barrier; in earlier sessions, address a barrier briefly and defer the formal method.
Steps (DPP uses a five-step model; step wording here is from general behavioural practice, manual worksheet not drawn on — [uncertain]): (1) Describe the problem in detail, as a chain of links. (2) Brainstorm options without judging. (3) Choose one option likely to work and feasible. (4) Make a concrete, positive action plan (what, when, where, how). (5) Try it, then review next session; if it fails, return to step 2.
Example language (illustrative): "Let's treat this as an experiment. If it doesn't work, we've learned something about what to try next."
Watch for: the coach generating all solutions; plans too vague to test. The DPP example for eating out early in the core: use the fat counter, pick the nearest equivalent food, ask for nutrition information, and bring menus to the next session.
[source: DPP 2002; DPP MOP §7]

4.13 Planning for eating out ("Four Keys to Healthy Eating Out")

Purpose / when: core session 10; whenever restaurant, takeaway or social meals derail plans.
Steps: (1) Plan ahead: choose the venue and dish before arriving. (2) Ask for what you want (preparation changes, sauces on the side). (3) Take charge of what's around you at the table (e.g. move bread away). (4) Choose lower-fat options; manage portions (share, box half). [four-key wording paraphrased; manual worksheet not drawn on — uncertain]
Example language (illustrative): "Before Friday's dinner, what would you order if you decided now, while you're not hungry?"
Watch for: social pressure; frequency of eating out (if daily, treat as a routine problem, not a special event).
[source: DPP MOP §7; DPP 2002]

4.14 Lapse management ("The Slippery Slope of Lifestyle Change")

Purpose / when: core session 12; at any slip.
Steps: (1) Present slips as a normal part of change. (2) Identify the person's high-risk triggers from records. (3) Distinguish a slip from a full relapse; spot all-or-nothing thinking. (4) Plan a specific recovery routine for the next meal/day. (5) Agree an early-warning rule (e.g. a personal weight band or missed-record days) that prompts re-engaging.
Example language (illustrative): "One evening off plan is a slip. What turns it into a slide is what we tell ourselves afterwards. What's your next meal going to look like?"
Watch for: shame and session avoidance after a slip; repeated slips from one trigger (go to 4.10/4.12).
[source: DPP 2002; DPP MOP §7]

4.15 Managing social cues and enlisting support ("Make Social Cues Work for You")

Purpose / when: core session 14; when family, friends or colleagues cue eating or undermine activity.
Steps: (1) List social cues that prompt unplanned eating or inactivity (offers of food, celebrations, a partner's snacking). (2) Plan responses: polite refusal, alternative suggestions, changing where the group meets. (3) Identify cues that help (an activity partner) and increase them. (4) Practise assertive requests to household members in role-play.
Example language (illustrative): "Let's practise what you'll say when your sister offers seconds. Say it the way you actually would."
Watch for: relationship conflict over food; a family member who sabotages — consider a joint session [synthesis].
[source: DPP MOP §7; DPP 2002]

4.16 Cognitive restructuring ("Talk Back to Negative Thoughts")

Purpose / when: core session 11; when self-defeating thoughts follow lapses or block action.
Steps: (1) Teach that thoughts influence eating and activity choices. (2) Help the person catch negative thoughts in situ (note them in the record). (3) Identify common types (e.g. all-or-nothing, excuses, self-criticism) [category labels paraphrased; manual not drawn on — uncertain]. (4) Generate a realistic, positive talk-back statement for each. (5) Practise using it in the moment.
Example language (illustrative): "When you hear 'I've blown it, so why bother', what would you say to a friend who said that?"
Watch for: pervasive low mood or hopelessness — screen for depression and refer if present [synthesis].
[source: DPP MOP §7; DPP 2002]

4.17 Stress management ("You Can Manage Stress")

Purpose / when: core session 15; when stress triggers eating or crowds out activity.
Steps: (1) Identify personal stress signs and stress-related eating from records. (2) Prevent stress where possible (planning, saying no, time management). (3) Use coping alternatives to eating (brief activity, relaxation, talking to someone). (4) Plan for high-stress periods in advance.
Example language (illustrative): "Your record shows evening snacking spikes on long shift days. What could take the edge off those evenings besides food?"
Watch for: stress severe enough to need its own treatment (Stuart's later observation that negative moods precede problem eating supports addressing them directly).
[source: DPP MOP §7; Stuart 1983 commentary; steps partly synthesis]

4.18 Motivation maintenance ("Ways to Stay Motivated")

Purpose / when: core session 16; transition into maintenance.
Steps: (1) Review gains since session 1 (graphs, health changes). (2) Revisit the person's original reasons. (3) Set new short-term goals. (4) Plan ongoing contact, periodic self-monitoring and supports (activity partner, groups, campaigns).
Example language (illustrative): "Look at where you started. Which three habits do you most want to still be doing a year from now?"
Watch for: sharp drop in contact after the core; complacency once a goal is reached.
[source: DPP MOP §7; DPP 2002]

4.19 The adherence toolbox (stepped individualisation)

Purpose / when: whenever a participant is not meeting weight, activity, self-monitoring or attendance goals.
Steps: (1) Identify the specific barrier with the participant. (2) Choose the least costly tool likely to address it (tools grouped into three cost levels as a rough guide). (3) Tailor any reward so it genuinely reinforces this person. (4) Set a time limit and review. (5) Step up to a more intensive tool only if the simpler one fails. (6) Discuss challenging cases at regular case conferences (the DPP recommended at least fortnightly) and track a few priority participants. Specific responses: weight not moving → check monitoring quality, then lower the calorie goal per protocol with medical oversight; low recorded intake without loss → check for forgotten items and portion errors; can't self-monitor → simplified or less frequent method; activity not increasing → alternate tracking tools, supervised sessions, classes, a trainer; attendance problems → attendance procedures (flexible times, phone contact). Resources in the DPP included exercise videos, community classes, cookbooks, portion-controlled foods and grocery vouchers.
Example language (illustrative): "It looks like records have been hard this month. Would a simpler way of tracking make it doable?"
Watch for: escalating effort that makes the participant feel pressured — retention takes priority.
[source: DPP 2002; DPP MOP §7; DPP Toolbox App. G]

4.20 Behavioural contracts and reinforcement systems

Purpose / when: short (4–6 week) periods to reinforce self-monitoring, activity or weight-change steps, especially when motivation flags.
Steps: (1) Write a contract naming measurable, short-term, realistic behaviours, how each is documented, and what is earned. (2) Use points convertible to non-cash rewards (the DPP's "DPP Dollars"), lotteries (best for attendance and returning records, since chance-based rewards for weight can feel unfair), or visual cumulative goals (e.g. logging activity as distance on a map, earning letters toward a phrase). (3) Reward steps, not only end goals. (4) Celebrate completion; review whether to continue.
Example language (illustrative): "For the next four weeks, each day you record food and activity earns a point. What would make a reward worth working for?"
Watch for: participants who find tangible rewards demeaning; rewarding one person in a way that discourages others in a group.
[source: DPP Toolbox App. G; DPP 2002]

4.21 Maintenance contact, group courses, campaigns and restarts

Purpose / when: after the core and for the life of the programme.
Steps: (1) Schedule regular face-to-face and phone contact, increasing frequency for anyone slipping. (2) Pick topics by need. (3) Ask for one week of self-monitoring each month. (4) Offer periodic group courses (activity, behavioural/motivational, healthy eating/weight loss) and time-limited motivational campaigns (team competitions, pedometer challenges, holiday "hold the line" campaigns with self-monitoring contracts). (5) Run short restart programmes for people who have regained: small teams with captains who contact members between weekly meetings, a choice of meal plan or full self-monitoring, daily weight graphing.
Example language (illustrative): "The next six weeks are a restart. Same tools, fresh start, and a team to keep you on track."
Watch for: campaigns that discourage people whose results are poor (the DPP warned against sharing group data with those likely to be discouraged).
[source: DPP 2002; DPP Toolbox App. G; NASEM Look AHEAD slides]

4.22 Traffic Light Eating Plan (paediatric FBT)

Purpose / when: first FBT units onward; a simple, child-friendly way to shift the family's diet toward lower-energy-density foods without counting.
Steps: (1) Introduce the three categories: green foods (low energy density, eat freely), yellow (moderate, eat in moderation), red (high energy density, eat rarely); use the programme's food reference guide. (2) Have parent and child sort foods they actually eat. (3) Set a weekly family goal (e.g. reduce red foods, add greens) and record against it. (4) Apply to the whole household, not only the child. (5) Review weekly; progress the goal when met on most days.
Example language (illustrative): "Let's sort what's in your cupboard tonight into green, yellow and red. Which reds could the whole family see less of this week?"
Watch for: red foods turned into forbidden or shameful foods; a child singled out from siblings; parent not following the plan. The older trials attached an energy limit; this guide omits it.
[source: UB Traffic Light page; PLAN/FBT protocol; NHLBI evidence table]

4.23 Traffic Light Activity Program, screen time and sleep

Purpose / when: alongside 4.22; increases activity and reduces sedentary behaviour.
Steps: (1) Classify activities by the programme's traffic-light scheme (active vs sedentary). (2) Set weekly goals for active play and family activity. (3) Set and monitor a daily limit on recreational screen time per the protocol. (4) Establish sleep routines. (5) Plan active social events with family and friends.
Example language (illustrative): "What active things does Maya enjoy that we could do as a family on Saturday?"
Watch for: screen-time limits becoming a power struggle (use reinforcement, 4.25, not punishment).
[source: PLAN/FBT protocol]

4.24 Family self-monitoring (habit books)

Purpose / when: throughout FBT.
Steps: (1) Give parent and child each a habit book. (2) Record food by traffic-light category, activity and screen time daily. (3) Bring books each session for review; praise completion. (4) Once skills are solid, allow technology tools (fitness tracker, food-logging app).
Example language (illustrative): "You filled in six days out of seven — that's exactly the habit we need. What made the seventh day hard?"
Watch for: parent recording for the child at an age the child could do it; books filled in just before sessions.
[source: PLAN/FBT protocol; NHLBI evidence table]

4.25 Parent praise and points-based reinforcement

Purpose / when: throughout; reinforces target behaviours in parent and child.
Steps: (1) Teach specific, immediate, labelled praise for target behaviours. (2) Set up a points system for meeting behavioural goals. (3) Exchange points for non-food rewards, ideally activities or time together (extra time with a parent, a sleepover with a friend). (4) Reinforce the parent's own changes too (in early trials, parents were reinforced for their behaviour and weight change). (5) Use contingency contracts where helpful (used in Epstein's earlier trials).
Example language (illustrative): "When Sam picks fruit instead of crisps, tell him right then what he did that you liked. 'You chose the apple — great choice.'"
Watch for: food as a reward; praise for weight rather than behaviour; inconsistent delivery.
[source: PLAN/FBT protocol; NHLBI evidence table]

4.26 Parental modelling and positive parenting

Purpose / when: throughout; parents are the main agents of change and also targets of weight change.
Steps: (1) Parent sets their own eating and activity goals and records them. (2) Parent visibly eats green foods, is active and limits screen time. (3) Coach parent in positive parenting: praise, consistent limits, avoiding nagging and criticism. (4) Review modelling successes each session.
Example language (illustrative): "Kids learn more from what they see you eat than from what you tell them. What will Sam see you doing differently this week?" (Epstein, quoted in UB press material: "Kids model their parents.")
Watch for: parent unwilling to change own behaviour; parent policing the child's plate ("acting like the food police" — Epstein, UB 2026).
[source: PLAN/FBT protocol; UB news 2026; UB Traffic Light page]

4.27 Restructuring the home environment (family stimulus control)

Purpose / when: the "family changes" unit and onward.
Steps: (1) Walk through the home's food and activity cues with the family. (2) Reduce red foods bought and kept; keep green foods visible and ready. (3) Make activity easy (equipment accessible, screens out of bedrooms [synthesis]). (4) Agree household rules that apply to all members.
Example language (illustrative): "If the reds aren't in the house, nobody has to say no to them twenty times a day."
Watch for: one parent or grandparent not on board; siblings resenting changes (frame as a whole-family health change; untreated siblings often improve too).
[source: PLAN/FBT protocol; UB news 2026; NHLBI evidence table (Golan 1998)]

4.28 Family goal setting, problem solving, pre-planning and mastery progression

Purpose / when: every session; governs pacing.
Steps: (1) Set specific weekly behavioural goals for parent and child. (2) Identify barriers and problem-solve; pre-plan challenging situations (parties, holidays, visits). (3) Give a short unit quiz at the end of each unit; if below the passing score, reteach the missed content and re-quiz. (4) Advance when goals are met on most days for two consecutive sessions; step down session frequency when both meet weight goals; step back up on regain.
Example language (illustrative): "Birthday party Saturday. Let's plan it now: what will you eat before, what will you choose there, and what's the fun active part?"
Watch for: families repeatedly stuck at one level — simplify goals; an Epstein trial found adding a separate problem-solving module did not improve on standard FBT, so keep it integrated rather than adding extra modules.
[source: PLAN/FBT protocol; NHLBI evidence table (Epstein 2000)]

4.29 Episodic future thinking

Purpose / when: included in the primary-care FBT protocol to reduce preference for small immediate rewards and support parental consistency.
Steps (protocol names the technique only; steps below follow Epstein's broader EFT research, not drawn on here — [uncertain]): (1) Parent (and child, if old enough) generate vivid, specific, positive future events at several time horizons. (2) Write brief cues for each. (3) Rehearse imagining them, especially before food or screen decisions. (4) Refresh events periodically.
Example language (illustrative): "Picture the camping trip in August: where you are, who's with you, what you're doing. Hold that picture for a moment before you decide about the snack."
Watch for: events that are vague or not personally rewarding.
[source: PLAN/FBT protocol; steps uncertain]

4.30 Teasing, assertive communication and peer networks

Purpose / when: "peer networks" unit; when teasing or peer settings undermine change.
Steps: (1) Teach the child coping responses to weight-related teasing and when to tell an adult. (2) Teach the family assertive communication for requests and refusals. (3) Help the child plan active social events with friends. (4) Build friendships around activity.
Example language (illustrative): "If someone says something mean at school, what's one thing you could say or do, and who would you tell?"
Watch for: bullying that needs school involvement; low mood or self-esteem — assess and refer [synthesis].
[source: PLAN/FBT protocol]

4.31 Community resources and paediatric relapse prevention

Purpose / when: "community" and "relapse prevention" units; maintenance.
Steps: (1) Map local healthy eating and activity resources (parks, leagues, classes) and plan regular use. (2) Identify high-risk situations (restaurants, parties, holidays) and pre-plan. (3) Plan how the family will notice and respond to drift. (4) Keep quarterly contact once maintenance goals have held; return to weekly if they don't.
Example language (illustrative): "Holidays are coming. Which two routines matter most to keep going, even if everything else changes?"
Watch for: family losing momentum once contact drops.
[source: PLAN/FBT protocol]

5. Handling problems

Weight not changing (stuck client). First check record quality: missing items, portion estimation, retrospective recording; then check activity records. Only after that, adjust the calorie goal per protocol and with medical oversight (the DPP set a floor and required central consultation before going lower). Consider structured meal plans or meal replacements (4.8), more frequent contact, or a restart group. [source: DPP MOP §7; DPP 2002]
Not self-monitoring (non-adherence). Ask what makes it hard; offer a simplified method or reduced frequency (e.g. record only one meal, or only red/high-fat foods) [simplified tools: DPP 2002; specific examples synthesis]; use a short contract with points or a lottery for returning records (4.20); praise any partial record. [source: DPP Toolbox App. G]
Missed sessions and dropout risk. Treat retention as the top priority: offer phone contact, flexible times, make-up sessions, or a lighter schedule the family can sustain; never let pressure to adhere push someone out. [source: DPP Toolbox App. G; PLAN/FBT protocol]
Ambivalence or "resistance". Return to the person's own reasons (4.1, 4.18); let them choose which change to test; frame each plan as an experiment; avoid prescribing. If the goal is someone else's (a doctor's, a parent's), say so openly and negotiate a goal they own. [source: DPP MOP §7 (collaboration, barriers as information); remainder synthesis]
Overwhelm. Cut to one dietary target and one activity target; slow the curriculum (a topic can be repeated for an extra meeting); use structured meal plans to reduce decisions. [source: DPP MOP §7; DPP 2002; synthesis]
Shame at weigh-ins, weight stigma or rupture. Weigh privately; comment on behaviour and trends, not the person; acknowledge any comment that landed badly and repair directly; check whether the person has felt judged by health professionals before. If weighing is highly distressing, discuss alternatives with the team (less frequent weighing, focusing on behavioural goals) [synthesis]. USPSTF lists weight stigma among harms it looked for. [source: DPP MOP §7; USPSTF 2018; synthesis]
Lapses and regain after the core. Normalise; use the slip plan (4.14); increase contact frequency; offer a restart programme or campaign; in FBT, step back up to weekly sessions. [source: DPP 2002; DPP Toolbox App. G; PLAN/FBT protocol]
Emerging disordered eating. Screen at intake (the FBT protocol used parent-report eating-pattern questionnaires and follow-up diagnostic interviews, and referred families with full psychiatric diagnoses elsewhere). During treatment, ask regularly about binge episodes, compensatory behaviours, rigid rules and preoccupation [synthesis: the protocol does not describe ongoing monitoring]. If they emerge, pause weight-loss goals and refer for eating-disorder assessment. USPSTF found no increase in disordered eating in child trials, but harms were sparsely reported in adults. [source: PLAN/FBT protocol; USPSTF 2018, 2024]
Depression, hopelessness or suicidal thoughts. Screen for depression (the FBT protocol screened parents with a standard depression questionnaire). If suicidal ideation is disclosed, do a standard risk assessment, collaborative safety plan and lethal-means counselling (safe storage or removal), and refer to mental-health services; postpone calorie reduction until mood is treated. [synthesis; screening: PLAN/FBT protocol]
Injury or pain with activity. Stop or modify the activity, refer for medical review, switch to lower-impact options; use medical clearance before increasing activity in higher-risk patients. [source: DPP 2002; USPSTF 2018; synthesis]
Medical complications (e.g. diabetes medication needing adjustment as intake changes). Do not adjust medicines; liaise with the prescribing clinician before and during calorie reduction. [synthesis]
Low literacy, numeracy or language barriers. Use simplified tracking (the DPP's "Quick Track"/"Count 100"), materials in the person's language, culturally familiar foods and cooking methods, and, where possible, coaches from similar backgrounds. [source: DPP 2002]
Family problems in FBT: parent won't change own behaviour, parents disagree, or child refuses. Revisit the rationale that parental modelling drives the child's outcome; set a small parent goal first; bring the second parent or carer into a session; switch from restriction to reinforcement (points, praise, active rewards); check the parent isn't policing food. If conflict is severe, consider a parenting-focused intervention first. [source: PLAN/FBT protocol; UB news 2026; remainder synthesis]
Child singled out or siblings resentful. Make all changes household-wide; avoid separate "diet" meals; involve siblings in active rewards. [source: UB Traffic Light page; synthesis]
Rewards backfire. Some adults feel demeaned by tangible rewards; switch to self-reward or social recognition. In children, never use food as a reward. [source: DPP Toolbox App. G; synthesis for food-reward rule]
Group-specific problems. Comparing results can discourage people doing poorly — share group data only when helpful, celebrate effort not just outcome, and handle individual weight discussions privately. [source: DPP Toolbox App. G; synthesis]
Practitioner fidelity drift. Both the DPP and the FBT trial used session audio-recordings, fidelity checklists, regular supervision and booster training; build a version of that into routine practice. [source: DPP 2002; PLAN/FBT protocol]

Sources

Sources:

Further reading (not drawn on) [uncertain where relied on]:

Stuart, R. B. (1967). Behavioral control of overeating. Behaviour Research and Therapy, 5, 357–365.
Wadden, T. A., et al. (2006). The Look AHEAD study: a description of the lifestyle intervention and the evidence supporting it. Obesity, 14, 737–752.
Epstein, L. H., Paluch, R. A., Roemmich, J. N., & Beecher, M. D. (2007). Family-based obesity treatment, then and now: twenty-five years of pediatric obesity treatment. Health Psychology, 26, 381–391.
Knowler, W. C., et al. (2002). Reduction in the incidence of type 2 diabetes with lifestyle intervention or metformin. New England Journal of Medicine, 346, 393–403.

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