Lifestyle psychiatry

1. Introduction

Version followed: lifestyle psychiatry as framed by APA-linked authors (Merlo, Sugden and Viswanathan 2024; the APA 2024–25 presidential theme) using the six lifestyle-medicine pillars named by the American College of Lifestyle Medicine (ACLM); clinical recommendations from the WFSBP/ASLM clinical guidelines for lifestyle-based care in major depressive disorder (Marx et al. 2022); implementation guidance from the third report of the Lancet Psychiatry Physical Health Commission (Teasdale et al. 2025); evidence status from the World Psychiatry meta-review of lifestyle psychiatry (Firth et al. 2020). Where these differ, the difference is named.

Lifestyle psychiatry is a framework, not a single psychotherapy. It is described as a psychiatric application of lifestyle medicine that uses lifestyle interventions, often as adjuncts, to reduce symptoms of syndromal and subsyndromal states [source: Merlo, Sugden & Viswanathan 2024]. The domains are the six ACLM pillars: nutrition, physical activity, restorative sleep, stress management, positive social connections and avoidance of risky substances [source: ACLM]. The incoming APA president's 2024 theme was "Lifestyle for Positive Physical and Mental Health", and the APA has a Committee on Lifestyle Psychiatry tasked with curricula and consensus statements [source: Psychiatric News 2024; APA committee page]. The core idea of change: everyday behaviours (moving, eating, sleeping, smoking and substance use, managing stress, connecting with others) interact with mental health in both directions, and supported, autonomously chosen changes in them can add to the effect of psychotherapy and medication [source: Firth et al. 2020; Teasdale et al. 2025].

For the psychotherapist, the role is assessment, motivational and behaviour-change work, linking lifestyle goals to behavioural activation and to the formulation, and referral to and collaboration with dietitians, exercise professionals, sleep services, smoking-cessation services and prescribers. Psychotherapists do not prescribe diets, exercise programmes, sleep schedules, supplements or numeric targets; those come from the qualified professional the client is referred to. Related guides: 061 Exercise therapy, 082 Behavioural medicine, 090 Digital CBT for insomnia, 103 Nutritional psychiatry.

Evidence status (attributed). Firth et al. (2020) concluded that physical activity has convergent support for prevention and treatment across several disorders; smoking is emerging as a possible causal factor in common and severe mental illness; diet needs clearer causal evidence and the best way to address it in mental health care is unresolved; poor sleep is a risk factor, with non-drug sleep interventions (mostly CBT-based) reducing depressive symptoms. They also note that in high-quality depression trials against active controls, exercise effects were small and non-significant. The WFSBP/ASLM guideline grades exercise, CBT-I, mindfulness-based therapies, breathing and progressive muscle relaxation, and work-directed interventions as limited-strength ("could") evidence for depressive symptoms; dietary counselling and green-space programmes as low ("may"); smoking-cessation support and social support/loneliness work as expert opinion [source: Marx et al. 2022]. A 2024 Lancet Psychiatry or World Psychiatry review on this topic is cited in some summaries [uncertain: not verified]; the most recent Commission report verified here is Teasdale et al. (2025).

2. Framework

The WFSBP/ASLM guideline organises lifestyle care in an Assess, Advise, Assist, Arrange structure [source: Marx et al. 2022]. The Lancet Psychiatry Commission adds an implementation view at macro, meso and micro (front-line team) levels [source: Teasdale et al. 2025]. The phases below adapt the first structure to psychotherapy; the adaptation is [synthesis].

Session counts: the sources cited do not specify a number of psychotherapy sessions for lifestyle work; it is usually integrated into an existing therapy rather than a separate course [synthesis]. Supervised exercise and specialist-delivered nutrition programmes have their own formats, set by those professionals [source: Teasdale et al. 2025].

3. Guiding principles

• Adjunct, not replacement. Lifestyle work sits alongside other treatment; the APA president-elect put it as "offered in addition to psychotherapy, pharmacotherapy, other somatic therapy" [source: Psychiatric News 2024]. In practice: never present lifestyle change as an alternative to indicated treatment.
• Stay within scope. Exercise is best supervised by an accredited exercise professional or physiotherapist, especially with physical comorbidity, and nutrition by a dietitian where available [source: Marx et al. 2022]; supervised exercise showed larger effects and fewer dropouts than unsupervised [source: Teasdale et al. 2025]. In practice: you explore, motivate and refer; you do not write plans, targets or doses.
• Autonomy-supportive motivation. Controlled (pressuring) motivational strategies were linked to higher dropout; autonomous motivation, health coaching and core motivational interviewing principles are recommended [source: Teasdale et al. 2025]. In practice: the client chooses the domain, the goal and the pace.
• No blame. Attributing a person's mental illness to their behaviours may be inaccurate, stigmatising and unhelpful, and responsibility also lies with policymakers and services [source: Firth et al. 2020]. In practice: talk about conditions and supports, not willpower or fault.
• Screen before encouraging. Lifestyle and body-measurement messages may be inappropriate or harmful for people with eating disorders, who should be offered specialist treatment [source: Teasdale et al. 2025]; compulsive exercise is linked to relapse, dropout and suicidality [source: Harris et al. 2022]; medical screening is advised before intensive activity [source: Marx et al. 2022]. In practice: ask about eating, weight, shape and exercise before discussing diet or activity.
• Tailor to the person. Explore capability, opportunity and motivation and the financial, geographic, medical and social context [source: Marx et al. 2022]; barriers include symptoms, low confidence, poor body image, money, transport and clothing [source: Teasdale et al. 2025]. In practice: a plan that ignores rent, shifts or childcare is not a plan.
• Match timing to mental state. Mindfulness-based approaches are not appropriate during acute or severe depressive episodes or psychosis, and can cause discomfort or heightened rumination [source: Marx et al. 2022]. In practice: stabilise first; start with the smallest, safest step.
• Restrictive diets are not recommended for mental health purposes, and supplements should not replace dietary approaches [source: Marx et al. 2022]. In practice: when a client raises keto, fasting or supplements, route to the prescriber and dietitian (see 103).
• Smoking cessation is mental-health care. Quitting did not worsen mental health and appeared to improve wellbeing, including in people with mental illness [source: Firth et al. 2020]; smoking alters the metabolism of some psychotropics [source: Marx et al. 2022]. In practice: support quitting and tell the prescriber, who manages any medicine effects.
• Evidence humility. State evidence status honestly (Section 1) and avoid overselling. In practice: "this may help" rather than "this will fix your depression".
• Social determinants count. Attention to social determinants of health is part of the framework [source: Psychiatric News 2024; Merlo, Sugden & Viswanathan 2024]; the guideline recommends formal social-needs assessment [source: Marx et al. 2022]. In practice: link clients to practical help, not only behaviour change.
• Clinician's own lifestyle and stance. Noordsy's text includes a chapter on physician lifestyle and health-promoting behaviour [source: Noordsy 2019, contents]. In practice: be aware of your own beliefs about food, bodies and exercise and keep them out of the client's plan [synthesis].

4. Intervention inventory

The inventory has two parts: (A) the psychotherapist's own interventions, and (B) the domain-specific pathways, describing what the qualified professional delivers and what the psychotherapist does alongside. Steps are written in my own words; where a step is not described in the sources it is marked [synthesis].

A1. Orienting conversation and psychoeducation

• Purpose: introduce the idea that sleep, activity, food, substances, stress and relationships interact with mood and symptoms, with honest evidence status, so the client can decide whether to include this in therapy. Use early, or when a client links symptoms to routines [source: Firth et al. 2020; Merlo, Sugden & Viswanathan 2024].
• Steps: (1) ask permission to discuss everyday routines; (2) name the six domains briefly [source: ACLM]; (3) give a two-way-street explanation (symptoms change routines; routines feed symptoms); (4) state evidence status plainly, including where it is limited (e.g. diet) [source: Firth et al. 2020; Marx et al. 2022]; (5) say what you will and will not do (no diet, exercise or sleep prescriptions; referral for those); (6) ask what fits for them.
• Example language (illustrative): "Some people find that how they're sleeping, moving, eating, and who they're seeing day to day is tangled up with how they feel. The research is stronger for some of these than others. Would it be useful to look at whether any of that is part of your picture? I won't hand you a diet or an exercise plan; if you want that kind of help, I can connect you with someone qualified."
• Watch for: shame or defensiveness ("so it's my fault"), which signals the no-blame framing needs repeating [source: Firth et al. 2020]; over-enthusiasm that drifts towards rigid rules (possible ED or compulsive-exercise risk; see A3). Working when: the client names one or two domains they are curious about.

A2. Lifestyle assessment across six domains

• Purpose: build a shared picture of each domain and its links to symptoms, plus the client's capability, opportunity and motivation, and financial, geographic, medical and social factors [source: Marx et al. 2022]. The guideline also recommends screening for substance and alcohol use and formal social-needs assessment [source: Marx et al. 2022]. Noordsy's text has a chapter on assessment and behaviour change and an appendix of questionnaires and measures [source: Noordsy 2019, contents]; which instruments it includes is [uncertain: not verified].
• Steps: (1) for each domain ask open questions about a typical day and recent changes (sleep pattern and quality; movement and sitting; regular meals and how eating feels; tobacco, alcohol, cannabis, other drugs, caffeine; main stresses and how they are handled; who they see and how connected they feel); (2) ask how each domain moves with mood, anxiety or other symptoms; (3) note medicines and side effects the client mentions (weight change, sedation, restlessness) for the prescriber, without interpreting them [synthesis]; (4) map barriers (money, transport, shifts, caring roles, housing, body image, confidence) [source: Teasdale et al. 2025]; (5) use validated screens for substance use or sleep only where you are trained and the instrument is licensed for your use, without reproducing items to the client [synthesis]; (6) write the links into the formulation.
• Example language (illustrative): "Walk me through a usual weekday, from when you wake up. Where does your energy dip? When does the low mood hit hardest? What's around you at that point?"
• Watch for: diet-quality self-reports are subject to recall bias, and a dietitian's assessment is more precise [source: Marx et al. 2022]; minimisation of substance use; signs needing the GP or a sleep service (loud snoring, witnessed breathing pauses, very sleepy in the day) [synthesis; CPAP evidence for depression with sleep apnoea per Firth et al. 2020]. Working when: you and the client can say which domain is most tied to their symptoms.

A3. Eating-disorder and compulsive-exercise screening

• Purpose: prevent lifestyle advice harming people with an eating disorder or compulsive exercise. Lifestyle and body-measurement messages may be inappropriate or harmful for them, and they should be offered specialist ED treatment [source: Teasdale et al. 2025]. Compulsive exercise is linked to longer hospitalisation, relapse, dropout, suicidality and poorer long-term outcomes [source: Harris et al. 2022].
• Steps: (1) before any diet or activity discussion, ask about restriction, bingeing, purging, preoccupation with weight and shape, and how they feel if they miss exercise; (2) ask about the quality of exercise, not only amount: driven or rigid feel, exercising to manage feelings or compensate for food, guilt when missing a session, exercising when ill or injured, hidden incidental activity [source: Harris et al. 2022]; (3) if positive, use a brief validated screen if trained (the Delphi panel suggested a brief screen then fuller assessment; the Compulsive Exercise Test is the ED-specific measure named) [source: Harris et al. 2022]; (4) if risk is present, pause diet and exercise goals and refer to the GP and a specialist eating-disorder service; (5) tell any exercise professional or dietitian, with consent.
• Example language (illustrative): "Before we talk about food or exercise, I want to check something I ask everyone. How do you feel about your body and eating at the moment? If you had to skip a workout, what would that be like for you?"
• Watch for: underreporting, especially in anorexia nervosa; compulsive exercise often comes before the ED and persists after treatment; exercising to lift mood is not automatically pathological [source: Harris et al. 2022]. Working when: risk is either ruled out or routed before lifestyle goals start.

A4. Medical-safety and medicines liaison

• Purpose: make sure change is safe. The guideline advises medical screening before intensive activity, with physician consultation and possibly formal exercise testing, and caution in heart disease, diabetes, asthma, vertigo, osteoporosis, joint disease and post-COVID conditions [source: Marx et al. 2022]. Smoking affects the metabolism of some psychotropics, and quitting can change caffeine effects [source: Marx et al. 2022].
• Steps: (1) ask about physical conditions and current medicines; (2) where any listed condition applies, or the client plans a big change in activity, suggest a GP or prescriber review first; (3) before a quit attempt, tell the prescriber (with consent) so they can review medicines; (4) never advise starting, stopping or changing a medicine or supplement; (5) record what was passed on.
• Example language (illustrative): "Because you take medication and you're planning to stop smoking, it's worth letting your prescriber know before your quit date. Smoking can change how some medicines work, and they'll want to keep an eye on that. Shall we write down what to tell them?"
• Watch for: clients planning sudden large changes; supplement or restrictive-diet plans (route to prescriber and dietitian; see 103). Working when: the prescriber or GP is informed and the plan has medical sign-off where needed.

A5. Shared prioritisation

• Purpose: avoid overload by choosing one domain, chosen by the client, that links most clearly to their goals [synthesis, consistent with autonomy support per Teasdale et al. 2025].
• Steps: (1) lay out the domains assessed; (2) ask which the client most wants to change, which feels most doable, and which links most to their symptoms; (3) agree one starting domain; (4) park the rest openly.
• Example language (illustrative): "We've looked at six areas. Trying all of them at once usually backfires. Which one, if it shifted a bit, would make the most difference to your week?"
• Watch for: choosing the domain the therapist favours; all-or-nothing plans. Working when: one domain is chosen and the client can say why.

A6. Motivational interviewing for lifestyle change

• Purpose: build autonomous motivation and resolve ambivalence. MI is named for dietary counselling and smoking cessation [source: Marx et al. 2022]; core MI principles, health coaching and autonomy support are recommended for exercise [source: Teasdale et al. 2025].
• Steps: (1) open questions about what the client values and how the current pattern fits; (2) reflect both sides of ambivalence; (3) elicit and reinforce change talk (desire, ability, reasons, need); (4) explore importance and confidence; (5) ask permission before giving information; (6) summarise and ask about next steps; (7) accept "not now" without pressure.
• Example language (illustrative): "Part of you would like to get outside more, and part of you says it's pointless when you feel this flat. Both make sense. What would make it feel even slightly worth trying?"
• Watch for: righting reflex (arguing for change), which raises resistance; controlled strategies, which were linked to higher dropout [source: Teasdale et al. 2025]. Working when: change talk increases and the client sets their own next step.

A7. Client-led goal-setting and self-monitoring

• Purpose: turn intentions into action. Firth et al. (2020) name behaviour-change techniques with specific, measurable goals and self-monitoring; the Commission recommends starting at a manageable level and using open-ended goals [source: Teasdale et al. 2025]. These differ: Firth et al. favour specific measurable goals, the Commission open-ended ones. A workable blend is a specific, client-chosen action with no externally set numeric target [synthesis].
• Steps: (1) the client names one action (what, when, where, with whom); (2) check confidence; if low, shrink it; (3) agree how they will notice whether they did it (diary, app, calendar tick) [digital tools for adherence per Marx et al. 2022]; (4) plan for obstacles; (5) review next session, without judgement; (6) progress only when the client chooses.
• Example language (illustrative): "What's one thing you'd like to try this week? Be as concrete as you like: which day, what time, where. How sure are you, out of ten, that you'll do it? What would make it one point more likely?"
• Watch for: the client adopting targets from social media or apps that become rigid rules; the therapist supplying numbers (out of scope); self-monitoring that becomes obsessive (ED or compulsive-exercise risk; return to A3). Working when: actions are being tried and reported honestly, including misses.

A8. Barrier problem-solving

• Purpose: address practical and psychological barriers named in the sources: symptoms, low confidence, poor body image, low motivation, money, transport and clothing [source: Teasdale et al. 2025]; capability, opportunity and motivation [source: Marx et al. 2022].
• Steps: (1) name the barrier specifically; (2) brainstorm options without judging; (3) pick one; (4) plan it; (5) review; (6) where the barrier is structural (money, housing, safety), link to social or practical support rather than more behaviour change [synthesis].
• Example language (illustrative): "So the gym costs too much and the park doesn't feel safe after dark. Let's list every option, even ones that sound silly, and then see which ones are realistic."
• Watch for: barriers that are really symptoms (anhedonia, fatigue, avoidance), which need the clinical work, not just logistics [synthesis]. Working when: the obstacle no longer stops the chosen action.

A9. Behavioural activation links

• Purpose: lifestyle actions such as a walk with a friend or cooking a meal can double as activity scheduling, pleasure and mastery, and social contact within behavioural activation for depression. The sources cited do not explicitly link lifestyle psychiatry to behavioural activation; this integration is [synthesis].
• Steps: (1) in the BA activity monitoring, note sleep times, movement, meals, substance use and contact with others alongside mood; (2) look for patterns (e.g. low mood after late nights or drinking); (3) choose valued activities that also involve movement, outdoors or company, chosen for value rather than calories or performance; (4) schedule them; (5) review mood alongside the activity; (6) refer on for structured exercise (see 061).
• Example language (illustrative): "Looking at your diary, Tuesdays and Saturdays were better days, and both had time outside with your sister. Would you like to plan more of that, because it matters to you, not because it burns anything?"
• Watch for: activity framed around weight or calories (redirect to values; ED screen); rest and recovery being dropped; fatigue from medicine or illness (prescriber). Working when: mood ratings rise with valued, sustainable activity.

B1. Sleep pathway (CBT-I and sleep services)

• Purpose: address insomnia and other sleep problems. CBT-I could reduce depressive symptoms (limited strength, Grade B) [source: Marx et al. 2022]; non-drug sleep interventions, mostly CBT-based, gave a large reduction in depressive symptoms in mixed psychiatric samples, and CPAP for depression with sleep apnoea showed a large effect in only two trials [source: Firth et al. 2020]. CBT-I is described as first-line therapy for insomnia [source: Merlo, Sugden & Viswanathan 2024]. Delivered by clinicians trained in CBT-I, sleep services or validated digital programmes (see 090); possible sleep apnoea needs medical assessment.
• Steps (psychotherapist): (1) assess sleep pattern, quality and daytime effects (A2); (2) screen for signs of a sleep disorder needing medical review; (3) if you are trained in CBT-I, deliver it according to its own protocol and safety checks (see 090); if not, refer to a CBT-I provider, sleep service or a digital CBT-I programme the team endorses; (4) link sleep to the formulation (rumination at night, trauma-related fears, substance use); (5) tell the prescriber about marked sleep changes; (6) review.
• Example language (illustrative): "Your sleep sounds like it's been a battle for months. There's a structured therapy for insomnia called CBT-I that's well established. I can refer you to someone who delivers it, and we can keep working on the worries that keep you awake."
• Watch for: reduced need for sleep with high energy in someone with a bipolar history, which needs the prescriber promptly [synthesis]; daytime sleepiness that may make driving unsafe (medical review) [synthesis]; mindfulness or relaxation increasing rumination for some [source: Marx et al. 2022]. No sleep-duration targets or schedules are set by the psychotherapist outside a CBT-I protocol. Working when: the client is in a sleep pathway and reports less distress about sleep.

B2. Physical activity pathway (exercise professionals)

• Purpose: physical activity has the most convergent support for prevention and treatment across disorders, though effects in high-quality depression trials against active controls were small [source: Firth et al. 2020]; exercise could reduce depressive symptoms (Grade B) [source: Marx et al. 2022]. Supervised programmes by an accredited exercise professional (physiotherapist, exercise physiologist) are favoured [source: Marx et al. 2022], and supervised exercise showed larger effects and lower dropout [source: Teasdale et al. 2025]. Programme design (type, intensity, frequency, progression) is the exercise professional's role; see 061.
• Steps (psychotherapist): (1) screen for ED and compulsive exercise (A3) and medical conditions (A4); (2) explore the client's history with movement, what they enjoyed, and body-image fears; (3) MI on importance and confidence (A6); (4) offer referral to an accredited exercise professional, a supervised programme in the service, or community or peer-led schemes [source: Firth et al. 2020; Teasdale et al. 2025]; (5) support social and enjoyable components (clubs, friends, family) [source: Marx et al. 2022]; (6) work on avoidance, social anxiety or shame that blocks attendance; (7) review attendance and mood.
• Example language (illustrative): "You said you used to love swimming but feel self-conscious now. Would it help to talk to an exercise physiologist who works with people in our service? They'll design something that fits your body and health. Here we can work on the worry about being seen."
• Watch for: exercise used to manage emotion or compensate for food; exercising through illness or injury [source: Harris et al. 2022]; physical symptoms (chest pain, dizziness) needing medical review [synthesis]. Working when: the client attends a programme they chose and mood or functioning improves.

B3. Nutrition pathway (dietitians)

• Purpose: dietary counselling towards healthy or nutrient-dense patterns may reduce depressive symptoms (low strength, Grade C1) [source: Marx et al. 2022]; Firth et al. (2020) found healthy dietary patterns associated with lower depression risk but called for clearer causal evidence. Dietitian-delivered interventions had stronger effects [source: Teasdale et al. 2025]. A trained dietitian is advised where available [source: Marx et al. 2022]. Restrictive diets (e.g. ketogenic or vegan) are not currently recommended for mental-health purposes, and supplements should not replace dietary approaches [source: Marx et al. 2022]. Ketogenic or metabolic therapies belong under medical supervision (see 103).
• Steps (psychotherapist): (1) ED screen first (A3); (2) explore regularity of eating, how appetite moves with mood, emotional eating, money and cooking access, and cultural food meaning, without recommending foods or amounts; (3) MI if the client wants change; (4) refer to a dietitian, with consent, sharing relevant mental-health context; (5) work on the psychological side (low energy for cooking, isolation at meals, shame, binge triggers); (6) route any supplement or restrictive-diet plan to the prescriber and dietitian.
• Example language (illustrative): "I'm not the right person to tell you what to eat, but I can help you think about what gets in the way. A dietitian can work out what suits you, your budget and your health. Would you like me to refer you?"
• Watch for: weight-loss focus, rigid food rules, secrecy around eating (A3); medication-related appetite or weight change (prescriber) [synthesis]; food insecurity (social support). Working when: a dietitian is involved where wanted and eating feels less tied to distress.

B4. Smoking cessation and substance use

• Purpose: smoking is an emerging possible causal factor in common and severe mental illness, and quitting did not worsen mental health [source: Firth et al. 2020]. Counselling and/or pharmacotherapy may reduce depressive symptoms in smokers (expert opinion) [source: Marx et al. 2022]. Cessation should begin under clinical supervision because withdrawal may increase fatigue, and sleep disturbance after quitting is common and may affect relapse [source: Marx et al. 2022]. Pharmacotherapy is the prescriber's role. Screen for alcohol and other substance use [source: Marx et al. 2022].
• Steps (psychotherapist): (1) ask about tobacco, vaping, alcohol and drug use without judgement; (2) MI on quitting or cutting down; (3) refer to a smoking-cessation service or tobacco treatment specialist, and inform the prescriber (A4); (4) teach urge management the guideline names: delay, escape, distract, substitute ("DEaDS") [source: Marx et al. 2022], and identify and manage triggers; (5) plan for withdrawal-related low mood, irritability and sleep change; (6) for alcohol or drug problems beyond brief work, refer to addiction services.
• Example language (illustrative): "When the urge to smoke hits after a stressful call, what if you tried delaying it for a few minutes, stepping out of the room, doing something else with your hands, or having a substitute ready? Which of those feels most possible?"
• Watch for: mood dips or sleep changes after quitting; medication side effects changing after quitting (prescriber); increased alcohol use replacing smoking [synthesis]. Working when: the client is engaged with cessation support and coping with urges.

B5. Stress management: breathing, relaxation and mindfulness

• Purpose: breathing techniques and progressive muscle relaxation could reduce depressive symptoms (Grade B) and are simple to use without specialised training; MBCT and MBSR could reduce depressive symptoms (Grade B) and should be delivered by appropriately trained professionals, face to face or through evidence-based digital tools [source: Marx et al. 2022].
• Steps (psychotherapist): (1) identify main stressors and current coping; (2) teach a slow-breathing or progressive-muscle-relaxation exercise in session if the client is stable; (3) practise together, then agree when to use it; (4) for mindfulness-based programmes, deliver only if trained, or refer to a trained provider or an evidence-based digital tool; (5) delay mindfulness during acute or severe depressive episodes or psychosis [source: Marx et al. 2022].
• Example language (illustrative): "Let's try a short relaxation exercise together now, tensing and releasing different muscle groups. Notice what you feel. Afterwards we'll talk about whether it's worth using at home."
• Watch for: discomfort or heightened rumination with mindfulness [source: Marx et al. 2022]; trauma-related distress with body-focus or eyes closed (offer eyes open, choice to stop) [synthesis]. Working when: the client uses the skill on their own and reports lower arousal.

B6. Social connection, loneliness and green space

• Purpose: improving social support and reducing loneliness may reduce depressive symptoms (expert opinion, Grade C3); individualised green-space contact or programmes may reduce depressive symptoms (Grade C1) [source: Marx et al. 2022]. Community options include support groups, spiritual organisations and recreation [source: Merlo, Sugden & Viswanathan 2024]; communal kitchens are associated with improved mental health and social connection [source: Merlo, Sugden & Viswanathan 2024].
• Steps (psychotherapist): (1) map relationships and isolation; (2) explore what kinds of connection the client values; (3) choose a small, low-pressure step (a group, a class, a call, volunteering, a walk in a park); (4) address social anxiety or avoidance in therapy; (5) link to community, peer or social-prescribing options where available [synthesis]; (6) review.
• Example language (illustrative): "You've said you feel cut off since moving. Is there one place, even online or once a month, where you might be around people who share something you care about?"
• Watch for: unsafe or exploitative relationships; groups that push restrictive eating or extreme exercise; cultural and accessibility barriers [synthesis]. Working when: the client reports more regular, valued contact.

B7. Work-directed interventions

• Purpose: work-focused counselling combined with work-directed interventions could reduce depressive symptoms (Grade B); workplace rehabilitation providers and occupational therapists can help coordinate these, with the individual's consent for employer contact [source: Marx et al. 2022].
• Steps (psychotherapist): (1) assess how work affects symptoms; (2) explore workload, conflict and return-to-work plans; (3) refer to occupational therapy or workplace rehabilitation if wanted; (4) obtain explicit consent before any employer contact; (5) work on cognitions and skills (assertion, boundaries) linked to work stress.
• Example language (illustrative): "Would it help to bring in an occupational therapist to plan a graded return to work? Nothing goes to your employer without your agreement."
• Watch for: pressure to return before ready; confidentiality breaches. Working when: a work plan exists that the client endorses.

C1. Referral, collaboration and shared care

• Purpose: arrange the professional input the client needs and keep care joined up. The guideline is addressed to any member of the care team, including allied health, generalists and peer workers [source: Marx et al. 2022]. The Commission recommends formal integration of specialists, training of mental-health staff in lifestyle assessment, digital screening forms that prompt referral, and peer workers and trained clinicians where specialists are unavailable [source: Teasdale et al. 2025].
• Steps: (1) agree with the client what to share and with whom; (2) refer with a short summary: reason, relevant mental-health factors, ED or medical flags, and the client's goals; (3) agree roles (the exercise professional sets activity, the dietitian sets nutrition, the sleep service or CBT-I clinician sets sleep work, the prescriber handles medicines); (4) set up a feedback route; (5) review together periodically; (6) pass on side effects or warning signs to the prescriber, with consent, or under your duty-of-care rules if there is risk.
• Example language (illustrative): "I'd like to send the dietitian a short note saying you're working with me on low mood and that eating has been hard. Is that OK, and is there anything you'd rather I left out?"
• Watch for: conflicting messages across professionals; the client feeling handed around [synthesis]. Working when: each professional knows their role and the client experiences one plan.

C2. Review, maintenance and ending

• Purpose: consolidate change and plan for lapses. Continuous evaluation and adaptation are recommended at service level [source: Teasdale et al. 2025]; the individual-level procedure below is [synthesis].
• Steps: (1) review each chosen domain against the client's own markers (mood, energy, enjoyment, functioning); (2) treat lapses as information; (3) write a short maintenance plan (what helps, early warning signs, who to contact); (4) confirm ongoing links with community or professional supports; (5) hand over at ending.
• Example language (illustrative): "Looking back, what changes have mattered most to you? If things slip after we finish, what would be your first sign, and what would you do?"
• Watch for: rigid maintenance rules; dropping supports as soon as mood lifts. Working when: the client can name what helps and how to get back on track.

5. Handling problems

The sources name participant barriers (symptoms of mental illness, low confidence, poor body image, low motivation, money, transport, clothing) and clinician barriers (scepticism about patients' abilities or motivation, low awareness) [source: Teasdale et al. 2025]. Most responses below are [synthesis] unless a source is given.

• Symptoms are the barrier (anhedonia, fatigue, avoidance). Shrink the step to the smallest version and frame it as an experiment; use behavioural activation logic (action before motivation) (A9). Ask the prescriber about sedation or fatigue that may be medicine-related. Illustrative: "We're not waiting until you feel like it. What's the tiniest version you could try and just notice what happens?" [synthesis]
• Ambivalence or "I've tried everything". Return to MI (A6): reflect the history, ask what worked even briefly, and respect "not now". Avoid controlled pressure, linked to dropout [source: Teasdale et al. 2025].
• Shame, blame or rupture ("you're saying I made myself ill"). Repair explicitly: acknowledge the impact, restate that illness is not caused by personal failure and that context and services share responsibility [source: Firth et al. 2020], and ask whether to continue lifestyle work or pause. Illustrative: "I think that landed as blame, and I'm sorry. That's not what I believe. Do you want to keep going with this, or put it aside for now?"
• Overwhelm from too many changes. Go back to one domain (A5); remove the rest from the agenda for now [synthesis].
• Non-adherence or missed goals. Review without judgement; ask what got in the way; problem-solve (A8); lower the step; check the goal is the client's, not the therapist's [synthesis].
• Eating-disorder signs emerge mid-work (restriction, compensatory exercise, rigid rules, rapid weight change reported by others). Pause diet and activity goals, assess, and refer to the GP and a specialist ED service; tell other professionals with consent [source: Teasdale et al. 2025; Harris et al. 2022].
• Compulsive exercise, including in athletes. Explore the driven quality, emotion-regulation function and guilt; standard measures may be less accurate in athletes and athlete-specific tools exist [source: Harris et al. 2022]. Coordinate with the ED team and any exercise professional; do not encourage more activity [synthesis].
• Client asks for a diet plan, calorie or weight target, sleep schedule, exercise prescription or supplement advice. Explain this is outside your role and refer (dietitian, exercise professional, CBT-I provider, prescriber). Illustrative: "That's a fair question, and the right answer depends on your health and medicines. A dietitian is the person to work that out with you. I can make the referral today." [synthesis]
• Client is on, or plans, a ketogenic, fasting or other restrictive diet, or supplements, for mental health. Note that such diets are not currently recommended for mental-health purposes [source: Marx et al. 2022]; route to the prescriber and a dietitian; ketogenic or metabolic therapy only under medical supervision (see 103). Do not advise stopping or starting anything.
• Weight gain or metabolic effects of medicines. Validate distress; do not suggest changing medicines; encourage the client to raise it with the prescriber and support them to prepare; screen for ED risk before any weight-related goal [synthesis].
• Bipolar disorder. Sleep loss, sudden surges of activity or new intense exercise routines may be early warning signs; pass on to the prescriber and the relapse-prevention plan [synthesis]. Be cautious about any change that disrupts sleep [synthesis].
• Psychosis or acute severe depression. Defer mindfulness-based work [source: Marx et al. 2022]; keep steps simple and supported; work with the team, peer workers or supervised programmes [source: Teasdale et al. 2025].
• Smoking-cessation withdrawal or relapse. Normalise low mood, irritability and sleep disturbance after quitting [source: Marx et al. 2022]; review urge strategies (DEaDS); inform the prescriber; treat lapses as learning [synthesis].
• Substance use replacing another habit (e.g. more alcohol after quitting smoking). Name the pattern, MI, and refer to addiction services where needed [synthesis].
• Poverty, housing, unsafe neighbourhood, caring duties. Treat as structural, not motivational; link to social-needs support [source: Marx et al. 2022]; choose actions that are free and accessible [synthesis].
• Body image and stigma in gyms or groups. Work on the fear in therapy; offer peer-led, women-only, disability-inclusive or home-based options via the exercise professional [synthesis].
• Conflicting advice from social media, influencers or apps. Explore what the client has read; share evidence status honestly (Section 1); route specific questions to the dietitian or prescriber [synthesis].
• Young people. Simply advising young people to be more active is unlikely to work; school-based and environmental approaches are favoured [source: Firth et al. 2020]. Involve families with consent and be alert to ED onset in adolescence [synthesis].
• No specialists available. Trained mental-health clinicians and peer workers with supervision may deliver lifestyle components, and task shifting is recommended in low-resource settings [source: Teasdale et al. 2025]; stay within your own training and scope [synthesis].
• Clinician scepticism or own biases. Notice assumptions about what clients can manage, which the Commission names as a barrier [source: Teasdale et al. 2025]; seek supervision when your own views on food, bodies or exercise enter the work [synthesis].

Sources

• A meta-review of "lifestyle psychiatry": the role of exercise, smoking, diet and sleep in the prevention and treatment of mental disorders (author-accepted manuscript, UCL Discovery). Firth J, Solmi M, Wootton RE, et al. (2020). World Psychiatry. DOI 10.1002/wps.20773; volume and pages [uncertain: not verified].
• White Rose repository record for Firth et al. 2020
• Clinical guidelines for the use of lifestyle-based mental health care in major depressive disorder: WFSBP and ASLM taskforce (JCU repository). Marx W, Manger SH, Blencowe M, et al. (2022). The World Journal of Biological Psychiatry. DOI 10.1080/15622975.2022.2112074.
• Teasdale SB, Machaczek KK, Marx W, et al. (2025). Implementing lifestyle interventions in mental health care: third report of the Lancet Psychiatry Physical Health Commission. Lancet Psychiatry 12: 700–22.
• Measuring exercise in eating disorder patients: a Delphi study to aggregate clinical and research knowledge. Harris A, Aouad P, Noetel M, Hay P, et al. (2022). Journal of Eating Disorders 10: 139.
• Lifestyle psychiatry: evidence-based lifestyle interventions for mental and physical health (Psychiatric Times). Merlo G, Sugden SG, Viswanathan R (2024).
• Viswanathan Introduces Theme of Lifestyle Psychiatry (Psychiatric News, 2024)
• APA Committee on Lifestyle Psychiatry
• How each lifestyle medicine pillar supports good nutrition (American College of Lifestyle Medicine)
• Lifestyle Psychiatry, ed. Noordsy (publisher listing and contents). Noordsy DL (ed.) (2019). Lifestyle Psychiatry. American Psychiatric Association Publishing. Contents only; chapter text [uncertain: not verified].
• Related guides: 061 Exercise therapy; 082 Behavioural medicine; 090 Digital CBT for insomnia; 103 Nutritional psychiatry.