100 ways to
build well-being.

McEwen’s work on allostasis established how physiological systems maintain stability through adaptation. The same stress-response mechanisms that protect us acutely can become damaging with repeated or prolonged activation.

McEwen BS. Protective and Damaging Effects of Stress Mediators. N Engl J Med. 1998. doi:10.1056/NEJM199801153380307

Allostatic-load research links cumulative physiological dysregulation with exposures and adaptation over time. IAWB extends this into a broader conceptual relationship between effective load and accessible reserve. That IAWB relationship is not yet a validated numerical measurement.

McCrory C, et al. Towards a Consensus Definition of Allostatic Load. Psychoneuroendocrinology. 2023. doi:10.1016/j.psyneuen.2023.106117

Stress-response biology distinguishes protective short-term activation from potentially harmful chronic dysregulation. The implication is not to eliminate challenges, but to match them to capacity and recovery.

McEwen BS. N Engl J Med. 1998. doi:10.1056/NEJM199801153380307

Bandura’s self-efficacy theory describes how beliefs about one’s capacity to act influence initiation, effort, and persistence. IAWB proposes that self-efficacy can function as one of several mechanisms governing resource accessibility.

Bandura A. Self-Efficacy: Toward a Unifying Theory of Behavioral Change. Psychol Rev. 1977. doi:10.1037/0033-295X.84.2.191

Developmental resilience research identifies ordinary protective processes— supportive relationships, effective regulation, and adaptive skills—as important contributors to positive functioning under adversity.

Masten AS. Ordinary Magic: Resilience Processes in Development. Am Psychol. 2001. doi:10.1037/0003-066X.56.3.227

Rutter described resilience as a dynamic process rather than a fixed personal attribute. In IAWB, observed resilience is distinct from underlying reserve: it becomes apparent during and after a perturbation.

Rutter M. Resilience as a Dynamic Concept. Dev Psychopathol. 2012. doi:10.1017/S0954579412000028

In controlled sleep-restriction experiments, cumulative neurobehavioral impairment developed despite incomplete subjective recognition of that impairment. IAWB uses this as an example of preserved apparent function masking deteriorating capacity.

Van Dongen HPA, et al. The Cumulative Cost of Additional Wakefulness. Sleep. 2003. doi:10.1093/sleep/26.2.117

A large pooled prospective analysis associated even activity levels below standard recommendations with lower mortality risk compared with inactivity. Its practical lesson is that partial improvement can matter substantially.

Arem H, et al. Leisure Time Physical Activity and Mortality. JAMA Intern Med. 2015. doi:10.1001/jamainternmed.2015.0533

Minimally disruptive medicine recognizes that treatment itself consumes time, attention, energy, and other resources. Simplifying care can make it more feasible, although specific simplification strategies must be evaluated individually.

May C, Montori VM, Mair FS. We Need Minimally Disruptive Medicine. BMJ. 2009. doi:10.1136/bmj.b2803

A Cochrane review found that decision aids improve knowledge and help patients make choices more consistent with their values. Patient-centered decisions are therefore an important part of translating scientific evidence into care.

Stacey D, et al. Decision Aids for People Facing Health Treatment or Screening Decisions. Cochrane Database Syst Rev. 2024. doi:10.1002/14651858.CD001431.pub6

Experimental restriction to four or six hours in bed for 14 days produced cumulative, dose-dependent deficits in vigilance and cognitive performance.

Van Dongen HPA, et al. Sleep. 2003. doi:10.1093/sleep/26.2.117

In a viral-challenge study, people sleeping less than six hours were more susceptible to developing a clinical cold than those sleeping more than seven hours. The study established an association, not that extending sleep will necessarily prevent an infection.

Prather AA, et al. Behaviorally Assessed Sleep and Susceptibility to the Common Cold. Sleep. 2015. doi:10.5665/sleep.4968

National survey data identified associations between insufficient sleep and reported respiratory infections. Because the analysis was observational, confounding and reverse causality remain possible.

Prather AA, Leung CW. Association of Insufficient Sleep With Respiratory Infection Among Adults in the United States. JAMA Intern Med. 2016. doi:10.1001/jamainternmed.2016.0787

The American College of Physicians recommends CBT-I as initial treatment for adults with chronic insomnia disorder, based on randomized-trial evidence.

Qaseem A, et al. Management of Chronic Insomnia Disorder in Adults. Ann Intern Med. 2016. doi:10.7326/M15-2175

The American Academy of Sleep Medicine strongly recommends multicomponent CBT-I and suggests against using sleep hygiene as the sole treatment for chronic insomnia.

Edinger JD, et al. Behavioral and Psychological Treatments for Chronic Insomnia Disorder. J Clin Sleep Med. 2021. doi:10.5664/jcsm.8986

In UK Biobank participants, objectively measured sleep regularity was associated with mortality outcomes independently of several conventional risk factors. This is prospective observational evidence, not proof that changing regularity reduces mortality.

Cribb L, et al. Sleep Regularity and Mortality. eLife. 2023. doi:10.7554/eLife.88359

Windred and colleagues found that the Sleep Regularity Index was a stronger predictor of mortality risk than sleep duration in their observational cohort analysis. That does not mean duration is unimportant.

Windred DP, et al. Sleep Regularity Is a Stronger Predictor of Mortality Risk Than Sleep Duration. Sleep. 2024. doi:10.1093/sleep/zsad253

Controlled human laboratory experiments found that circadian misalignment adversely affected glucose regulation, blood pressure, and other selected metabolic and cardiovascular measures.

Scheer FAJL, et al. Adverse Metabolic and Cardiovascular Consequences of Circadian Misalignment. PNAS. 2009. doi:10.1073/pnas.0808180106

Human circadian physiology research demonstrates that light timing, intensity, duration, and spectrum influence the biological clock. Responses vary, and appropriately timed therapeutic light may be needed for specific circadian disorders.

Duffy JF, Czeisler CA. Effect of Light on Human Circadian Physiology. Sleep Med Clin. 2009. doi:10.1016/j.jsmc.2009.01.004

In a randomized trial of adults with overweight who habitually slept less than 6.5 hours, a sleep-extension intervention reduced objectively measured energy intake over two weeks.

Tasali E, et al. Effect of Sleep Extension on Objectively Assessed Energy Intake. JAMA Intern Med. 2022. doi:10.1001/jamainternmed.2021.8098

A dose-response meta-analysis of large prospective cohorts found that relatively small amounts of nonoccupational physical activity were associated with meaningful reductions in mortality and cardiovascular disease risk.

Garcia L, et al. Non-Occupational Physical Activity and Risk of Cardiovascular Disease, Cancer and Mortality. Br J Sports Med. 2023. doi:10.1136/bjsports-2022-105669

A large pooled cohort analysis found substantial differences in mortality risk between inactive adults and those doing modest amounts of activity. Additional activity offered benefits, but the dose-response relationship was not linear.

Arem H, et al. JAMA Intern Med. 2015. doi:10.1001/jamainternmed.2015.0533

A 2024 network meta-analysis involving 218 randomized trials found that multiple exercise modalities reduced depressive symptoms relative to active controls. Certainty varied, so exercise should complement rather than automatically replace indicated treatment.

Noetel M, et al. Effect of Exercise for Depression. BMJ. 2024. doi:10.1136/bmj-2023-075847

A landmark study demonstrated meaningful strength improvements with resistance training among people in their 90s, challenging the assumption that advanced age necessarily eliminates adaptability.

Fiatarone MA, et al. High-Intensity Strength Training in Nonagenarians. JAMA. 1990. PubMed:2342214/

A systematic review and meta-analysis identified a dose-response relationship between weekly resistance-training volume and muscle hypertrophy. More training may increase gains within some ranges, but tolerance and recovery limit practical application.

Schoenfeld BJ, et al. Dose-Response Relationship Between Weekly Resistance Training Volume and Muscle Mass. J Sports Sci. 2017. doi:10.1080/02640414.2016.1210197

A systematic review and meta-analysis found no clear hypertrophy advantage for training to momentary muscular failure compared with nonfailure training. Effort, load, volume, and individual context remain important.

Refalo MC, et al. Influence of Resistance Training Proximity-to-Failure on Skeletal Muscle Hypertrophy. Sports Med. 2023. doi:10.1007/s40279-022-01784-y

A Cochrane review found high-certainty evidence that exercise reduces falls among community-dwelling older adults, with programs emphasizing balance and functional exercises particularly effective.

Sherrington C, et al. Exercise for Preventing Falls in Older People Living in the Community. Cochrane Database Syst Rev. 2019. doi:10.1002/14651858.CD012424.pub2

A meta-analysis found that protein supplementation can augment resistance- training gains in muscle mass and strength. The observed average benefit plateaued around 1.6 g/kg/day of total protein intake, although individual requirements vary.

Morton RW, et al. Effect of Protein Supplementation on Resistance Training-Induced Gains. Br J Sports Med. 2018. doi:10.1136/bjsports-2017-097608

In the Diabetes Prevention Program, intensive lifestyle intervention reduced diabetes incidence by approximately 58% relative to placebo over the initial study period.

Knowler WC, et al. Reduction in the Incidence of Type 2 Diabetes With Lifestyle Intervention or Metformin. N Engl J Med. 2002. doi:10.1056/NEJMoa012512

Resistance-training evidence shows that greater proximity to failure does not consistently produce greater hypertrophy. IAWB interprets this as an example of why maximizing stimulus is not synonymous with optimizing adaptation.

Refalo MC, et al. Sports Med. 2023. doi:10.1007/s40279-022-01784-y

The corrected and republished PREDIMED randomized trial found fewer major cardiovascular events among higher-risk participants assigned Mediterranean-style dietary interventions. Interpretation should acknowledge the trial’s original randomization irregularities.

Estruch R, et al. Primary Prevention of Cardiovascular Disease With a Mediterranean Diet. N Engl J Med. 2018. doi:10.1056/NEJMoa1800389

Large systematic reviews and meta-analyses found that higher dietary fiber intake was associated with lower risks of several chronic diseases and mortality outcomes, supported by trial evidence for selected cardiometabolic risk factors.

Reynolds A, et al. Carbohydrate Quality and Human Health. Lancet. 2019. doi:10.1016/S0140-6736(18)31809-9

The original DASH randomized feeding trial demonstrated that dietary pattern changes can reduce blood pressure, including effects observed without requiring weight loss.

Appel LJ, et al. A Clinical Trial of the Effects of Dietary Patterns on Blood Pressure. N Engl J Med. 1997. doi:10.1056/NEJM199704173361601

In a tightly controlled inpatient crossover trial, participants consumed approximately 500 more calories per day during the ultra-processed diet condition than during the unprocessed condition.

Hall KD, et al. Ultra-Processed Diets Cause Excess Calorie Intake and Weight Gain. Cell Metab. 2019. doi:10.1016/j.cmet.2019.05.008

A two-year randomized trial comparing calorie-restricted diets with different macronutrient compositions found broadly similar average weight-loss outcomes. Adherence and practical implementation remain important.

Sacks FM, et al. Comparison of Weight-Loss Diets With Different Compositions of Fat, Protein, and Carbohydrates. N Engl J Med. 2009. doi:10.1056/NEJMoa0804748

In a 12-month randomized trial involving adults with obesity, time-restricted eating combined with calorie restriction did not produce significantly greater weight loss than calorie restriction alone.

Liu D, et al. Calorie Restriction With or Without Time-Restricted Eating in Weight Loss. N Engl J Med. 2022. doi:10.1056/NEJMoa2114833

The resistance-training protein literature demonstrates meaningful relationships between total protein intake and adaptation. It does not establish that an elaborate nutrient-timing protocol is necessary for most people.

Morton RW, et al. Br J Sports Med. 2018. doi:10.1136/bjsports-2017-097608

The SMILES randomized trial found that a structured dietary-improvement intervention produced greater improvement in depressive symptoms than a social-support control condition. This was a relatively small adjunctive trial, not evidence that diet replaces psychiatric treatment.

Jacka FN, et al. A Randomised Controlled Trial of Dietary Improvement for Adults With Major Depression. BMC Med. 2017. doi:10.1186/s12916-017-0791-y

Randomized sleep-extension research demonstrates that changing sleep opportunity can affect energy intake. This provides direct evidence of an interaction between behavioral and metabolic systems.

Tasali E, et al. JAMA Intern Med. 2022. doi:10.1001/jamainternmed.2021.8098

A meta-analysis reported potential antidepressant benefits for selected omega-3 formulations, but effects varied across studies. Supplement-specific findings cannot be generalized to all products, doses, or psychiatric conditions.

Liao Y, et al. Efficacy of Omega-3 PUFAs in Depression: A Meta-Analysis. Transl Psychiatry. 2019. doi:10.1038/s41398-019-0515-5

Allostatic research describes how repeated activation of neuroendocrine and autonomic pathways may contribute to cumulative physiological dysregulation. The response varies with the nature, duration, and context of the stressor.

McEwen BS. N Engl J Med. 1998. doi:10.1056/NEJM199801153380307

Human viral-challenge research linked chronic stress with glucocorticoid receptor resistance and altered inflammatory regulation. Stress should not be described as uniformly suppressing or stimulating immunity.

Cohen S, et al. Chronic Stress, Glucocorticoid Receptor Resistance, Inflammation, and Disease Risk. PNAS. 2012. doi:10.1073/pnas.1118355109

In a landmark viral-challenge study, higher psychological stress was associated with a greater likelihood of developing a clinical cold following controlled exposure to respiratory viruses.

Cohen S, Tyrrell DAJ, Smith AP. Psychological Stress and Susceptibility to the Common Cold. N Engl J Med. 1991. doi:10.1056/NEJM199108293250903

Yeager and colleagues found that a brief intervention combining growth mindset with a stress-can-be-enhancing mindset improved several psychological and physiological stress-response outcomes in adolescents and students. This does not mean severe or unsafe stress is beneficial.

Yeager DS, et al. A Synergistic Mindsets Intervention Protects Adolescents From Stress. Nature. 2022. doi:10.1038/s41586-022-04907-7

The synergistic mindsets intervention targeted beliefs about both the capacity to improve and the meaning of physiological stress. Benefits were heterogeneous, with some of the strongest findings among participants with less adaptive baseline mindsets.

Yeager DS, et al. Nature. 2022. doi:10.1038/s41586-022-04907-7

A meta-analysis of mindfulness-based therapies found improvements in anxiety and mood symptoms in clinical populations. Effects vary by population and intervention, and mindfulness is not a substitute for all indicated treatments.

Hofmann SG, et al. The Effect of Mindfulness-Based Therapy on Anxiety and Depression. J Consult Clin Psychol. 2010. doi:10.1037/a0018555

Experimental research demonstrated that expressive suppression can alter physiological responding without fully reducing the subjective emotional experience. Regulation strategies have different effects depending on context.

Gross JJ, Levenson RW. Emotional Suppression: Physiology, Self-Report, and Expressive Behavior. J Pers Soc Psychol. 1993. doi:10.1037/0022-3514.64.6.970

The COBRA randomized trial found that behavioral activation was noninferior to cognitive behavioral therapy for depression under the conditions studied. Structured behavior change can therefore be a legitimate therapeutic pathway.

Richards DA, et al. Cost and Outcome of Behavioural Activation Versus Cognitive Behavioural Therapy for Depression. Lancet. 2016. doi:10.1016/S0140-6736(16)31140-0

A comprehensive meta-analysis of 409 trials supports CBT as an effective psychological treatment for depression. IAWB places cognitive intervention within a wider clinical formulation rather than treating all difficulties as problems of thinking.

Cuijpers P, et al. Cognitive Behavior Therapy for Depression: A Comprehensive Meta-Analysis. World Psychiatry. 2023. doi:10.1002/wps.21069

Acceptance and Commitment Therapy provides a model of psychological flexibility involving acceptance, awareness, values, and committed action. IAWB incorporates this as a possible pathway through which agency can be expressed despite constraints.

Hayes SC, et al. Acceptance and Commitment Therapy: Model, Processes and Outcomes. Behav Res Ther. 2006. doi:10.1016/j.brat.2005.06.006

The original Adverse Childhood Experiences study demonstrated graded associations between childhood adversity and multiple adult health risks. The observational findings do not mean that any particular outcome is inevitable.

Felitti VJ, et al. Relationship of Childhood Abuse and Household Dysfunction to Many of the Leading Causes of Death in Adults. Am J Prev Med. 1998. doi:10.1016/S0749-3797(98)00017-8

A systematic review and meta-analysis demonstrated that multiple adverse childhood experiences were associated with substantially elevated risks across numerous later health and behavioral outcomes.

Hughes K, et al. The Effect of Multiple Adverse Childhood Experiences on Health. Lancet Public Health. 2017. doi:10.1016/S2468-2667(17)30118-4

Resilience research demonstrates substantial heterogeneity among individuals exposed to developmental risk and identifies protective processes that support adaptation.

Masten AS. Am Psychol. 2001. doi:10.1037/0003-066X.56.3.227

Rutter’s developmental model emphasizes that resilience depends on changing processes, experiences, and environmental conditions rather than an unchanging trait.

Rutter M. Dev Psychopathol. 2012. doi:10.1017/S0954579412000028

Randomized experiments in the synergistic mindsets program demonstrated that carefully designed interventions targeting beliefs about ability and stress can improve selected outcomes in adolescents.

Yeager DS, et al. Nature. 2022. doi:10.1038/s41586-022-04907-7

Mastery experiences are a central proposed source of self-efficacy in Bandura’s framework. Confidence becomes more meaningful when supported by actual behavioral capability.

Bandura A. Psychol Rev. 1977. doi:10.1037/0033-295X.84.2.191

A meta-analysis of implementation intentions found that specifying when, where, and how an action will occur improves goal attainment across varied behaviors and circumstances.

Gollwitzer PM, Sheeran P. Implementation Intentions and Goal Achievement: A Meta-Analysis. Adv Exp Soc Psychol. 2006. doi:10.1016/S0065-2601(06)38002-1

Real-world habit-formation research found that automaticity generally develops through repetition in consistent contexts. The time required varies considerably between individuals and behaviors.

Lally P, et al. How Are Habits Formed: Modelling Habit Formation in the Real World. Eur J Soc Psychol. 2010. doi:10.1002/ejsp.674

A meta-analysis of self-determination theory in health settings found favorable associations among autonomy support, autonomous motivation, psychological need satisfaction, and healthrelated outcomes.

Ng JYY, et al. Self-Determination Theory Applied to Health Contexts: A Meta-Analysis. Perspect Psychol Sci. 2012. doi:10.1177/1745691612447309

Developmental resilience research emphasizes that protective processes emerge from interactions between individuals and their environments. IAWB extends this into its distinction between resources that exist and resources that can be mobilized.

Masten AS. Am Psychol. 2001. doi:10.1037/0003-066X.56.3.227

A meta-analysis of 148 studies involving approximately 309,000 participants found that stronger social relationships were associated with a 50% greater likelihood of survival over the studied follow-up periods. This was an observational association.

Holt-Lunstad J, Smith TB, Layton JB. Social Relationships and Mortality Risk. PLoS Med. 2010. doi:10.1371/journal.pmed.1000316

A meta-analysis found that perceived loneliness, objective social isolation, and living alone were each associated with elevated mortality risk. These are related but distinguishable constructs.

Holt-Lunstad J, et al. Loneliness and Social Isolation as Risk Factors for Mortality. Perspect Psychol Sci. 2015. doi:10.1177/1745691614568352

A major review linked social support with differences in cardiovascular, endocrine, and immune measures. Mechanisms and causal interpretations vary across studies.

Uchino BN, Cacioppo JT, Kiecolt-Glaser JK. The Relationship Between Social Support and Physiological Processes. Psychol Bull. 1996. doi:10.1037/0033-2909.119.3.488

In a viral-challenge study, greater diversity of social ties was associated with lower susceptibility to clinical colds. These results do not prove that simply increasing the number of contacts improves immunity.

Cohen S, et al. Social Ties and Susceptibility to the Common Cold. JAMA. 1997. doi:10.1001/jama.1997.03540480040036

Self-determination theory identifies relatedness as a basic psychological need, alongside autonomy and competence. A large health-context meta-analysis supports relationships among need satisfaction, motivation, and beneficial outcomes.

Ng JYY, et al. Perspect Psychol Sci. 2012. doi:10.1177/1745691612447309

A systematic review and meta-analysis of randomized trials found that psychological interventions can reduce loneliness, although effects and methods vary considerably.

Hickin N, et al. The Effectiveness of Psychological Interventions for Loneliness. Clin Psychol Rev. 2021. doi:10.1016/j.cpr.2021.102066

A meta-analysis of experimental studies found a small-to-moderate improvement in the helper’s well-being following acts of kindness. Helping is beneficial in some contexts, but excessive obligation may create its own burden.

Curry OS, et al. Happy to Help? Effects of Performing Acts of Kindness on Well-Being. J Exp Soc Psychol. 2018. doi:10.1016/j.jesp.2018.02.014

A meta-analysis linked caregiving responsibilities, particularly intensive dementia caregiving, with adverse physical-health indicators. The burden depends on circumstances and available support.

Vitaliano PP, Zhang J, Scanlan JM. Is Caregiving Hazardous to One’s Physical Health? Psychol Bull. 2003. doi:10.1037/0033-2909.129.6.946

Reviews of interventions for loneliness and isolation in older adults identify potential benefits from multicomponent approaches, including exercise and group-based interventions. Evidence remains heterogeneous, and no single format works for everyone.

Interventions Associated With Reduced Loneliness and Social Isolation in Older Adults. JAMA Netw Open. 2022. PMC:PMC9577679/

The Alameda County longitudinal study found that people with fewer social and community ties had higher subsequent mortality rates, even after adjustment for several baseline characteristics.

Berkman LF, Syme SL. Social Networks, Host Resistance, and Mortality. Am J Epidemiol. 1979. doi:10.1093/oxfordjournals.aje.a112674

Human circadian experiments demonstrate that environmental light regulates biological timing through specific retinal and neural pathways. Environmental influences can operate without deliberate behavioral decisions.

Duffy JF, Czeisler CA. Effect of Light on Human Circadian Physiology. Sleep Med Clin. 2009. doi:10.1016/j.jsmc.2009.01.004

Light can shift circadian phase depending on its timing, intensity, spectrum, and duration. Appropriate light–dark exposure supports biological synchronization, although exact lighting prescriptions require individualization.

Duffy JF, Czeisler CA. Sleep Med Clin. 2009. doi:10.1016/j.jsmc.2009.01.004

Research reviews associate environmental noise with sleep disturbance, annoyance, impaired cognitive performance, and selected cardiovascular outcomes. Adaptation to the subjective experience does not necessarily eliminate physiological responses.

Basner M, et al. Auditory and Non-Auditory Effects of Noise on Health. Lancet. 2014. doi:10.1016/S0140-6736(13)61613-X

A controlled study found reduced self-reported rumination and changes in neural activity associated with rumination following a nature walk compared with an urban walk. It was a short-term study, not proof of durable psychiatric benefit.

Bratman GN, et al. Nature Experience Reduces Rumination and Subgenual Prefrontal Cortex Activation. PNAS. 2015. doi:10.1073/pnas.1510459112

A systematic review and meta-analysis found lower cortisol measurements in some forest-bathing studies. Study quality, timing, and heterogeneity limit conclusions, and cortisol changes should not be equated with improved long-term health.

Antonelli M, et al. Effects of Forest Bathing on Cortisol as a Stress Biomarker. Int J Biometeorol. 2019. doi:10.1007/s00484-019-01717-x

A large Medicare cohort study found that long-term exposure to PM2.5 and ozone was associated with increased mortality, including at relatively low pollution concentrations.

Di Q, et al. Air Pollution and Mortality in the Medicare Population. N Engl J Med. 2017. doi:10.1056/NEJMoa1702747

Built-environment research identified associations among community design, travel patterns, physical activity, and obesity. Residential self-selection and other confounders complicate causal interpretation.

Frank LD, et al. Obesity Relationships With Community Design, Physical Activity, and Time Spent in Cars. Am J Prev Med. 2004. doi:10.1016/j.amepre.2004.04.011

A Cochrane review found that certain housing improvements, especially warmth and energy-efficiency interventions targeted to people with inadequate housing conditions, may improve health outcomes. Effects differed substantially across settings.

Thomson H, et al. Housing Improvements for Health and Associated Socio-Economic Outcomes. Cochrane Database Syst Rev. 2013. doi:10.1002/14651858.CD008657.pub2

Human light-response research establishes that nocturnal light can affect circadian regulation, while environmental-noise research links noise exposure with sleep disruption. The magnitude of benefit from specific bedroom changes depends on the actual exposure.

Duffy & Czeisler, 2009; Basner et al., 2014. doi:10.1016/j.jsmc.2009.01.004 • doi:10.1016/S0140-6736(13)61613-X

Habit research demonstrates the importance of consistent environmental cues in developing automatic behavior. IAWB interprets environmental design as a way to reduce behavioral friction and potentially improve access to available resources.

Lally P, et al. Eur J Soc Psychol. 2010. doi:10.1002/ejsp.674

A meta-analysis of ten prospective studies involving more than 136,000 participants found that greater purpose in life was associated with lower all-cause mortality and cardiovascular-event risk. These associations do not establish that purpose itself causes longer life.

Cohen R, Bavishi C, Rozanski A. Purpose in Life and Its Relationship to All-Cause Mortality and Cardiovascular Events. Psychosom Med. 2016. doi:10.1097/PSY.0000000000000274

A 2026 meta-analysis incorporating 25 samples and approximately 489,000 participants found a consistent association between greater purpose and lower mortality risk. The association attenuated after adjustment for clinical and psychological factors, reinforcing the need for caution about causality.

Sutin AR, et al. Purpose in Life and Mortality: A Meta-Analysis. Psychol Med. 2026. doi:10.1017/S0033291726104863

Acceptance and Commitment Therapy emphasizes values clarification and committed action as central components of psychological flexibility. This supports using values to guide behavior without implying that purpose alone resolves illness or distress.

Hayes SC, et al. Behav Res Ther. 2006. doi:10.1016/j.brat.2005.06.006

The self-determination literature supports associations between autonomy- supportive conditions, autonomous motivation, and positive behavioral outcomes.

Ng JYY, et al. Perspect Psychol Sci. 2012. doi:10.1177/1745691612447309

Bandura’s theory identifies mastery experiences as a major source of self-efficacy. Confidence developed through meaningful experience can influence willingness to initiate and persist in behavior.

Bandura A. Psychol Rev. 1977. doi:10.1037/0033-295X.84.2.191

Research on self-efficacy emphasizes the role of performance accomplishments in strengthening perceived capability. IAWB uses this as one pathway through which progress may support future action.

Bandura A. Psychol Rev. 1977. doi:10.1037/0033-295X.84.2.191

Implementation-intention research shows that specifying responses to relevant cues can improve goal-directed behavior. Aspirations are more likely to influence daily routines when connected to practical execution.

Gollwitzer PM, Sheeran P. Adv Exp Soc Psychol. 2006. doi:10.1016/S0065-2601(06)38002-1

Psychological flexibility models emphasize willingness to experience difficult internal states while engaging in values-consistent action. This does not require passivity or resignation.

Hayes SC, et al. Behav Res Ther. 2006. doi:10.1016/j.brat.2005.06.006

Experimental research indicates that prosocial acts can improve the helper’s subjective well-being. This supports contribution as one possible pathway to a more satisfying life, not as an obligation to put others first at all times.

Curry OS, et al. J Exp Soc Psychol. 2018. doi:10.1016/j.jesp.2018.02.014

Purpose–mortality research demonstrates that existential constructs contain health- relevant information not completely explained by standard clinical variables. IAWB goes further by treating health, performance, and experienced well-being as distinct outcomes. That distinction is conceptually important but is not fully tested by these studies.

Sutin AR, et al. Psychol Med. 2026. doi:10.1017/S0033291726104863

Housing-intervention research demonstrates that changing material living conditions can influence health. IAWB therefore treats societal and structural factors as genuine components of a person’s architecture, not merely background details.

Thomson H, et al. Cochrane Database Syst Rev. 2013. doi:10.1002/14651858.CD008657.pub2

The Medicare air-pollution study demonstrated population-level associations between pollution exposure and mortality. It illustrates why improving health requires attention to environmental and policy conditions, not solely individual choices.

Di Q, et al. N Engl J Med. 2017. doi:10.1056/NEJMoa1702747

Minimally disruptive medicine explicitly recognizes the interaction between treatment workload and a patient’s capacity to manage care. This fits IAWB’s emphasis on preserving accessible reserve.

May C, Montori VM, Mair FS. BMJ. 2009. doi:10.1136/bmj.b2803

Evidence on decision aids supports informed, values-congruent treatment selection. IAWB extends this principle by asking whether the selected intervention targets an active constraint. Its proposed bottleneck-ranking algorithm remains unvalidated.

Stacey D, et al. Cochrane Database Syst Rev. 2024. doi:10.1002/14651858.CD001431.pub6

McCrory and colleagues examined 40 biomarkers across 12 physiological systems in an individual-participant-data meta-analysis involving 67,126 people. Their work supports multisystem assessment while highlighting the lack of one universally accepted measure of allostatic load.

McCrory C, et al. Psychoneuroendocrinology. 2023. doi:10.1016/j.psyneuen.2023.106117

Frailty research demonstrates that vulnerability can be characterized using measurable physical features and can predict adverse outcomes. IAWB proposes a broader six-state classification, but those six states have not been validated as clinical staging categories.

Fried LP, et al. Frailty in Older Adults: Evidence for a Phenotype. J Gerontol A Biol Sci Med Sci. 2001. doi:10.1093/gerona/56.3.M146

Controlled sleep-restriction studies demonstrate accumulating neurobehavioral impairment despite incomplete awareness of the decline. IAWB proposes that rising compensatory cost may be an early marker of fragility, but that prediction requires prospective testing.

Van Dongen HPA, et al. Sleep. 2003. doi:10.1093/sleep/26.2.117

Dynamic resilience research emphasizes that adaptation unfolds through interacting processes over time. IAWB proposes distinct but potentially overlapping recovery processes; their specific sequence and clinical usefulness still require validation.

Rutter M. Dev Psychopathol. 2012. doi:10.1017/S0954579412000028

Frailty research demonstrates that functional characteristics can provide information not fully captured by diagnosis alone. IAWB builds on this principle by proposing that function and recovery trajectory should be central measures of system health.

Fried LP, et al. J Gerontol A Biol Sci Med Sci. 2001. doi:10.1093/gerona/56.3.M146

Research on allostatic load, resilience, behavior change, and patient-centered care supports the importance of multiple interacting determinants. IAWB synthesizes these findings into a hypothesis about identifying leverage points in an individual’s network. Whether that strategy improves outcomes beyond standard multidisciplinary care remains an essential research question.

McCrory et al., 2023; Rutter, 2012; Stacey et al., 2024. doi:10.1016/j.psyneuen.2023.106117 • doi:10.1017/S0954579412000028 • doi:10.1002/14651858.CD001431.pub6