Every source has a place in the story.
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Five paths into adaptation and recovery.
Start with selected research. See what was studied, what was found and how far the findings reach.
1993Conceptual reviewStress and the individual. Mechanisms leading to diseaseArchives of Internal Medicine
Introduces allostatic load as a way to understand the physiological costs that may accompany prolonged challenges.
Who and what was studiedSynthesis of human and animal research; no single trial sample
This conceptual review integrates human and animal research. It does not directly establish that a particular intervention or product is effective.
View the original source1998ReviewProtective and damaging effects of stress mediatorsNew England Journal of Medicine
Explores the dual nature of adaptation through the protective and damaging effects of stress mediators.
Who and what was studiedReview; no single trial sample
This is a review of mechanisms and research context, not an individual diagnostic standard or a product clinical trial.
View the original source2003Experimental studyThe cumulative cost of additional wakefulness: dose-response effects on neurobehavioral functions and sleep physiology from chronic sleep restriction and total sleep deprivationSleep
Repeated sleep restriction produced cumulative cognitive performance deficits that subjective sleepiness did not fully track.
Who and what was studied48 healthy adults aged 21–38; experiments included 14 nights of restricted time in bed
Laboratory sleep restriction does not define everyone’s recovery timeline or a universal recovery debt.
View the original source2010Meta-analysisGreater cardiovascular responses to laboratory mental stress are associated with poor subsequent cardiovascular risk status: a meta-analysis of prospective evidenceHypertension
Examines links between cardiovascular recovery after laboratory mental stress and later cardiovascular risk status.
Who and what was studiedRecovery analyses included 30 associations reported in 5 articles
Prospective associations do not show that changing one recovery measure will reduce an individual’s risk.
View the original source2011ReviewStress- and Allostasis-Induced Brain PlasticityAnnual Review of Medicine
Discusses the relationships between stress, adaptation and brain plasticity.
Who and what was studiedSynthesis of human and animal research; no single trial sample
The evidence spans species and study designs. Mechanistic findings cannot be directly generalised to the effects of a specific intervention in humans.
View the original source2012Conceptual reviewAllostasis: a model of predictive regulationPhysiology & Behavior
Explains regulation through anticipated needs and the adjustment of resources.
Who and what was studiedTheoretical synthesis; no single trial sample
An account of regulation, not evidence of universal agreement on definitions or measurement.
View the original source2015ReviewRecovery from job stress: The stressor-detachment model as an integrative frameworkJournal of Organizational Behavior
Connects research on job demands, psychological detachment and recovery.
Who and what was studiedReview of occupational psychology research; no single trial sample
A framework for work settings; it does not replace measures of sleep, cardiovascular or exercise recovery.
View the original source2016Systematic reviewPhysical Resilience in Older Adults: Systematic Review and Development of an Emerging ConstructThe Journals of Gerontology: Series A
Distinguishes reserve from performance after a health stressor and proposes a working definition of physical resilience.
Who and what was studied49 articles addressing physical health and resilience in older adults
Definitions and measures varied. The review does not establish a universal resilience score for younger adults.
View the original source2017Meta-analysisA Meta-Analysis on Antecedents and Outcomes of Detachment from WorkFrontiers in Psychology
Detachment was, on average, associated with less fatigue and better self-reported sleep and well-being. Average associations with physiological stress indicators were not significant.
Who and what was studied86 publications, 91 independent samples, 38,124 employees
Associations do not establish causality. Findings across outcomes cannot be collapsed into one recovery score.
View the original source2018Consensus statementRecovery and Performance in Sport: Consensus StatementInternational Journal of Sports Physiology and Performance
Considers training, competition and other life demands together with recovery, individual variation and ongoing monitoring.
Who and what was studiedMultidisciplinary expert consensus; not a single athlete trial
Consensus does not establish that a recovery method works for every population, nor does it constitute an evidence grade.
View the original source2022Systematic reviewAllostatic Load Measurement: A Systematic Review of Reviews, Database Inventory, and Considerations for Neighborhood ResearchInternational Journal of Environmental Research and Public Health
Compares approaches to measuring allostatic load and considers how relevant databases can be used in neighbourhood research.
Who and what was studied18 reviews covering 238 studies
Indicators and methods vary across the included reviews. The paper does not provide a universal threshold for individual diagnosis.
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Currently featuring 11 foundational papers
These reading notes have not completed scientific review. Selected reading is not a systematic review.
Read the research. Understand its limits.
We distinguish findings from interpretation and share sources and limitations. A–D grades require completed searching, appraisal and verification.