I normally talk about three pillars of health: sleep, exercise and diet. They are really, really important in ADHD. Familiarity can make us overlook them. We know the recommendations, so we assume the foundations are there. Then we ask someone to concentrate, organise themselves and regulate their emotions without examining whether they are sleeping, eating or moving in a way that supports that work.
My starting point is that we mustn't separate ADHD out from basic cellular metabolism and cellular health. Attention happens in a living body. So do motivation, restlessness and the capacity to stay with something difficult. That body is using energy, digesting food, moving between activity and rest, and responding to the demands around it. I want to know how the person is actually living through the day, because the diagnosis alone cannot give us that account.
There is a substantial bodily picture here. A Swedish register study involving nearly five million people found that diagnosed ADHD was associated with a wide range of physical conditions across adulthood. This gives us a strong reason to examine physical health as part of ADHD care. A person may bring an attention difficulty to an appointment while also living with pain, disturbed sleep, breathing problems or another condition that needs its own attention. Those experiences all meet in the same day.
Sleep is usually the first thing I want to improve when it is clearly going wrong. If your sleep is bad and you expect medication to carry the whole situation, that is counterproductive. We need to give sleep a proper place in treatment. Adult experiments show poorer attention after sleep loss, and observed daytime sleepiness has been associated with missed responses beyond ADHD symptom severity. The next useful question is specific: are you sleepy, mentally overloaded, physically exhausted, or some combination? Each answer opens a different piece of work.
Exercise, food and water belong in this same assessment. Movement gives the body physical activity after hours of sitting. Food supplies energy and a range of nutrients. Hydration supports ordinary bodily functioning. We should ask when these things happen, how reliable they are and what gets in the way. “I eat well” might mean a nourishing evening meal after barely eating all day. “I exercise” might mean an ambitious plan that has become another source of disappointment. Clinical work begins with the actual pattern.
The pillars affect one another through very ordinary sequences. A difficult night can leave shopping and cooking beyond reach. Missing lunch may leave someone ravenous when there is little energy to prepare food. Work that extends into the evening takes away the time intended for movement and winding down. Caffeine can help carry the tired day into another late night. These are useful sequences to understand because changing one condition may create room for another change. We do not need to improve everything simultaneously.
This is how I use SEEDS thinking. Look around a repeated difficulty and examine the body, the activity, relationships, surroundings and wider demands together. If meals are being missed at work, we might need food within reach, a real break and permission to stop. If movement never happens, we might need company, a manageable route and less preparation. If bedtime keeps slipping, we need to understand what the evening is providing that the rest of the day has not. The intervention should follow that understanding.
Knowing what to do on paper and making changes are different things. These routines ask for planning, remembering, transitions and repetition, precisely the functions that may need support in ADHD. An OT can help make the sequence visible, reduce decisions and find an achievable entry point. Psychological work matters too, especially when a failed routine immediately becomes “I am lazy”. Start where you are, with one part of the pattern and enough support to learn what makes it repeatable.
The evidence behind the article
Research notes and references
Facts: adult experiments connect sleep loss and exercise with selected attention outcomes; the Swedish register study maps ADHD and physical diagnoses across adulthood. The register associations do not establish that habits caused those conditions, and shared familial factors contributed. Interpretation: the three pillars and the bodily/context account are the author’s clinical priorities; no study tests or ranks this exact package for every adult. Patient application: examine a real daily sequence and support one achievable change. The 2022 Australian lifestyle review had no eligible adult studies at its cutoff; newer trials are considered separately. SEEDS adult application extends the published model. Stress–inflammation findings come from a selected, observational sample overlapping PROBIA. Medication can remain effective when sleep is impaired; the argument concerns addressing sleep alongside treatment.
References: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17.
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Australasian ADHD Professionals Association. (2022). Australian evidence based clinical practice guideline for ADHD. Section 4.1 Lifestyle changes.
Read source 1 Study notes
Clinical guidance supports health foundations; its review found limited intervention evidence and no eligible adult studies at that time. Later adult research is assessed separately.
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Adamou, M., et al. (2021). Recommendations for occupational therapy interventions for adults with ADHD: a consensus statement from the UK adult ADHD network. BMC Psychiatry, 21, 72. doi 10.1186/s12888-021-03070-z.
Read source 2 Study notes
Expert consensus about OT assessment and intervention. A practice framework, not a trial showing that all proposed strategies improve ADHD symptoms.
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Díaz-Román, A., Mitchell, R., & Cortese, S. (2018). Sleep in adults with ADHD: Systematic review and meta-analysis of subjective and objective studies. Neuroscience & Biobehavioral Reviews, 89, 61–71. doi: 10.1016/j.neubiorev.2018.02.014.
Read source 3 Study notes
Adult-specific systematic review of subjective and objective sleep. Supports screening sleep difficulties; does not establish a universal REM or deep-sleep deficit. Full abstract and bibliographic record verified; publisher full text unavailable.
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Xu, S., Zhao, C., & Hu, L. (2026). The effects of acute and chronic exercise on executive functions and core symptoms in adults with ADHD: A systematic review and meta-analysis. Psychology of Sport and Exercise, 84, 103088. doi: 10.1016/j.psychsport.2026.103088.
Read source 4 Study notes
Adult-specific review finds short-term inhibitory-control and smaller symptom benefits; sustained exercise evidence was mixed. Search ended April 2025. Complete abstract, metadata and publisher-indexed methods/discussion inspected; full publisher retrieval blocked. Laboratory outcomes should not be equated with everyday functioning.
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Svedell, L. A., Lindvall, M. A., Holmqvist, K. L., Cao, Y., & Msghina, M. (2025). Physical exercise as add-on treatment in adults with ADHD – the START study: a randomized controlled trial. Frontiers in Psychiatry, 16, 1690216. doi: 10.3389/fpsyt.2025.1690216.
Read source 5 Study notes
Adult twelve-week trial favoured supported mixed exercise added to usual care. High attrition, a small single-centre sample, unblinded participation and extra planning support for some participants limit confidence. Full intervention methods, results and limitations inspected.
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National Health and Medical Research Council. (2013). Australian Dietary Guidelines. Australian Government.
Read source 6 Study notes
General nutrition guidance, not an ADHD treatment trial. Supports variety, water, limiting added sugars and saturated fats, and including unsaturated fats.
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Bal, N. The Seeds OT Model — an introduction. Seeds Occupational Therapy. Accessed 10 October 2026.
Read source 7 Study notes
Source of the organisation's reasoning framework, currently written for paediatric practice. Adult application here is an adaptation, not a validated ADHD protocol.
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Bal, N. The Seeds OT Model — Part 5: The formal structure. Seeds Occupational Therapy. Accessed 10 October 2026.
Read source 8 Study notes
Supports mapping conditions and recurring patterns. The adult worksheets are original examples developed for this draft.
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Dan O, Cohen A, Asraf K, Saveliev I, Haimov I. The Impact of Sleep Deprivation on Continuous Performance Task Among Young Men With ADHD. Journal of Attention Disorders. 2021;25(9):1284–1294. doi:10.1177/1087054719897811. First published online January 9, 2020.
Read source 9 Study notes
34 young men: 16 with ADHD and 18 without ADHD; mean age 25.38 years. Sleep deprivation worsened missed responses, incorrect responses, reaction time and response variability in both groups. The ADHD group performed worse overall, but the published study concluded that both groups were similarly affected by deprivation. Small male sample, extreme acute sleep loss and repeated task testing. This is direct adult ADHD evidence for impaired attention after sleep deprivation; it does not quantify the impact of ordinary short nights, establish worsening across every clinical ADHD symptom or show greater vulnerability in all ADHD adults.
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Helfer B, Bozhilova N, Cooper RE, Douzenis JI, Maltezos S, Asherson P. The key role of daytime sleepiness in cognitive functioning of adults with attention deficit hyperactivity disorder. European Psychiatry. 2020;63(1):e31. doi:10.1192/j.eurpsy.2020.28.
Read source 10 Study notes
111 adults, including 81 with diagnosed ADHD and 30 controls; mean overall age 32.4 years. ADHD participants withheld stimulant medication for at least 48 hours before testing. Adults with ADHD were sleepier during the attention task. Within ADHD participants, observable sleepiness correlated with missed responses even after accounting for ADHD symptom severity. Sleepiness deserves assessment when someone appears inattentive or inconsistent. Sleep was not experimentally improved or restricted, so this does not establish that sleep loss caused ADHD or that treating sleep resolves ADHD. Observer-rated sleepiness is distinct from the cause of that sleepiness; resting EEG slowing was not explained simply by normal drowsiness.
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Mehren A, Özyurt J, Lam AP, Brandes M, Müller HHO, Thiel CM, Philipsen A. Acute Effects of Aerobic Exercise on Executive Function and Attention in Adult Patients With ADHD. Frontiers in Psychiatry. 2019;10:132. doi:10.3389/fpsyt.2019.00132.
Read source 11 Study notes
23 adults with ADHD and 23 matched controls. Participants with ADHD withheld stimulant medication for at least 48 hours before visits. The ADHD group responded faster on the attention task after cycling than after the film condition. No exercise-related fMRI activation difference was found across the full ADHD sample. Fitness-related subgroup findings were exploratory. Small acute experiment measuring laboratory performance, without establishing sustained clinical improvement, a universal dose or a mechanism involving dopamine, oxygen deficiency or detoxification. Faster processing should not be described as improvement in every executive function.
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Ganio, M. S., Armstrong, L. E., Casa, D. J., et al. (2011). Mild dehydration impairs cognitive performance and mood of men. British Journal of Nutrition, 106(10), 1535–1543. doi:10.1017/S0007114511002005.
Read source 12 Study notes
26 healthy young men, mean age approximately 20; no ADHD sample. At average body-mass loss of about 1.6%, selected vigilance and working-memory measures worsened, alongside fatigue and tension/anxiety. Exercise/laboratory conditions and a male-only small sample limit everyday generalisation. Supports avoiding dehydration; it does not show that extra water improves ADHD in someone already adequately hydrated, flushes toxins, or resets neurotransmitters.
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Walter, A., Martz, É., Weiner, L., et al. (2026). Sleep, rest-activity rhythm, cognitive and emotional symptoms in adult ADHD: unraveling the links with an actimetry-based approach. BMC Psychiatry, 26, 317. doi:10.1186/s12888-026-07947-9.
Read source 13 Study notes
Primary observational study: 54 newly diagnosed, stimulant-naïve adults with ADHD and 47 controls; roughly 10 days of wrist actigraphy. ADHD adults had a later rest phase and less stable day-to-day activity rhythms after age/sex adjustment. Most exploratory sleep/cognition correlations did not survive multiple-testing correction. Supports assessing timing and regularity as part of sleep care; no intervention or causal claim. Full methods, results and limitations read.
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Van der Ham, M., Bijlenga, D., Molenaar, N., et al. (2026). The Effects of Sleep Treatment on Symptoms of ADHD, Sleep Quality, Fatigue, and Depressive Symptoms in Adults. Journal of Attention Disorders, 30(3), 354–369. doi:10.1177/10870547251379103. First published online 27 October 2025.
Read source 14 Study notes
Preliminary open-label randomized trial: 70 adults with diagnosed ADHD and a positive sleep-disorder screen. Added sleep treatment improved subjective sleep quality (between-group β=-1.98; d=0.42) and fatigue (β=-6.52; d=1.59) beyond usual ADHD care, without significant additional ADHD-symptom reduction. Twenty percent missed final assessment. Abstract and appendix read; appendix gives 25/22/23 participants, correcting the abstract's inconsistent 25/22/33. Supports treating sleep as a meaningful clinical outcome in its own right.
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Schnorr, I., Siegl, A., Luckhardt, S., et al. (2024). Inflammatory biotype of ADHD is linked to chronic stress: a data-driven analysis of the inflammatory proteome. Translational Psychiatry, 14, 37. doi:10.1038/s41398-023-02729-3.
Read source 15 Study notes
Baseline primary analysis of 126 diagnosed adults from PROBIA, selected for high irritability/moderate impairment. Protein clustering identified higher/lower inflammatory profiles; chronic perceived stress correlated with one inflammatory composite (rho=.30, p<.001). No significant association with ADHD rating severity or subtypes. No healthy controls, site differences and cross-sectional design; neither stress causality nor lifestyle-treatment effects established. Supports including bodily stress/immune processes in clinical reasoning. Full methods, results and limitations read. Uses the PROBIA synbiotic-trial cohort; these analyses are not independent replications.
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Bernacer, J., Gambra, L., Rodriguez-Romero, D., Carbonell, M. E., Magallon, S., & Arrondo, G. (2025). Association between ADHD symptoms, physical effort discounting, and unhealthy lifestyles in adults. Scientific Reports, 15, 17255. https://doi.org/10.1038/s41598-025-02024-9
Read source 16 Study notes
Cross-sectional study of 181 adults aged 18–33, including 58 clinically diagnosed ADHD participants, analysed dimensionally. More ADHD symptoms predicted fewer high-effort choices in a hypothetical treadmill-for-money task; greater effort discounting was associated with sedentary behaviour. In the actual button-pressing task, reward probability, money, fatigue and medication status influenced decisions, but ADHD symptoms were not independently significant. Medication comparisons were observational. This supports examining anticipated effort in lifestyle implementation; it does not establish cognitive-effort aversion, a dopamine mechanism, or intervention efficacy.
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Du Rietz, E., Brikell, I., Butwicka, A., Leone, M., Chang, Z., Cortese, S., D’Onofrio, B. M., Hartman, C. A., Lichtenstein, P., Faraone, S. V., Kuja-Halkola, R., & Larsson, H. (2021). Mapping phenotypic and aetiological associations between ADHD and physical conditions in adulthood in Sweden: a genetically informed register study. The Lancet Psychiatry, 8(9), 774–783. doi:10.1016/S2215-0366(21)00171-1.
Read source 17 Study notes
Primary publisher PDF, available through the University of Groningen repository; methods, main results and limitations inspected. Swedish registers included 4,789,799 people and sibling comparisons; physical diagnoses were recorded from age 18, with mean final age 47 (range 18–81). ADHD was associated with 34/35 conditions examined. Diagnostic ascertainment, more severe treatment-seeking cases and residual confounding limit causal interpretation; many associations involved shared genetic factors. The study did not test a lifestyle intervention.
