Science
The research the BLOCKS assistant answers from: 1,118 studies and 81 guides, each graded for how strong the evidence is and who it was measured on, with a link to the original paper.
92 entries in Sleep, recovery & monitoring
BFive to seven weeks of sleep extensionA goal of at least 10 h in bed, which bought about 111 min more sleep a night — made 11 collegiate basketball players faster over a timed sprint (16.2 → 15.5 s), more accurate (free throws +9%…Mah 2011C+Training monotony is the week's mean daily load divided by the standard deviation of those daily loads and training strain is the week's load multiplied by monotonyAnd in the 25 athletes the constructs were built on, illness clustered where each athlete crossed a threshold identified for him individually, mostly on strain, not where anyone crossed a shared…Foster 1998B+In 5069 endurance athletes (abstract; 5311 in the Results and Table 1, corrected 2026-10-12, full text) tested to exhaustion, 9 of 13 age-based HRmax formulas differed significantly from the measured valueAnd even the four that agreed on average were wrong by about 10 bpm on the individual (RMSE 9.1-10.5)Kasiak 2023B+Will a hard evening session cost me sleep?In 14,689 active adults, a maximal session ending 2 h before bedtime went with sleep 36 min later and 22 min shorter than a light one; easier ones ending ≥4 h before did not. Observational.Leota 2025A-Morning versus evening exercise and sleepSystematic review (25 studies, 4233 participants) with a meta-analysis of 16 RCTs (n=611): no clear overall advantage of morning over evening exercise for most sleep outcomes; evening/night exercise…Souabni 2026A-Physical recovery modalities in competitive and elite endurance athletesNetwork meta-analysis of 16 RCTs (273 participants): no modality outperformed passive recovery on soreness, creatine kinase or sport-specific performance; compression garments do not improve…Jin 2026B+Age-predicted maximal heart rate revisitedA meta-analysis of group mean HRmax values (351 studies, 492 groups, 18,712 subjects) gave HRmax = 208 − 0.7 × age (r = −0.90), and a laboratory study measuring HRmax in 514 healthy subjects gave a…Tanaka 2001ARecommended Amount of Sleep for Pediatric Populations: A Consensus Statement of the American Academy of Sleep MedicineSleep is essential for optimal health in children and adolescents, and AASM members used a modified RAND Appropriateness Method to set consensus amounts of sleep by age; the abstract itself does not…Paruthi 2016CLongitudinal changes in wearable-captured physiology before sudden cardiac deathA single case report: in a 76-year-old man with advanced structural heart disease who died minutes after high-intensity indoor cycling, a retrospective change-point analysis of his Apple Watch and…Lautman 2026B-After damaging eccentric exercise, 1 g/kg of alcohol roughly doubles the strength loss measured 36 hours later; an undamaged muscle is unaffectedBarnes 2010BAlcohol after exercise lowers muscle glycogen storage when it is drunk instead of the recovery meals; drunk on top of the full meals, its direct effect is unclearBurke 2003BA binge dose of alcohol after concurrent training (1.5 g/kg, about 12 drinks) cuts myofibrillar protein synthesis by 24% even when 25 g of protein is taken with itParr 2014BAlcohol lowers HRV-derived overnight recovery in a dose-dependent way starting from small intakes, and being physically active does not protect against itPietilä 2018A-Alcohol before bed delays and shortens REM sleep from about two standard drinks, and the effect grows with dose; total sleep time and sleep efficiency are not reliably changedGardiner 2025BPerformance success or failure is influenced by weeks lost to injury and illness in elite Australian track and field athletes: A 5-year prospective studyRaysmith & Drew 2016A-Monitoring and adapting endurance training on the basis of heart rate variability monitored by wearable technologies: A systematic review with meta-analysisDüking 2021A-Long-term static stretching can decrease muscle stiffness: A systematic review and meta-analysisTakeuchi 2023A-Do thermal agents affect range of movement and mechanical properties in soft tissues? A systematic reviewBleakley & Costello 2013A-Effects of Evening Exercise on Sleep in Healthy Participants: A Systematic Review and Meta-AnalysisStutz 2018BCaffeine effects on sleep taken 0, 3, or 6 hours before going to bedDrake 2013B+Sleep and the athlete: narrative review and 2021 expert consensus recommendationsWalsh 2020BSelf-rated mental stress and exercise training response in healthy subjectsRuuska 2012BExtended Sleep Maintains Endurance Performance Better than Normal or Restricted SleepRoberts 2019A-The Effects of Regular Cold-Water Immersion Use on Training-Induced Changes in Strength and Endurance Performance: A Systematic Review with Meta-AnalysisMalta 2020B+Do We Need a Cool-Down After Exercise? A Narrative Review of the Psychophysiological Effects and the Effects on Performance, Injuries and the Long-Term Adaptive ResponseVan Hooren & Peake 2018BA New Detection Method Defining the Aerobic Threshold for Endurance Exercise and Training Prescription Based on Fractal Correlation Properties of Heart Rate VariabilityRogers 2021BThe Cognitive Costs of Sleep Deprivation in Ultra-Endurance Cycling: Insights From the Race Across FranceHurdiel 2026BRecovery of Inflammation, Cardiac, and Muscle Damage Biomarkers After Running a MarathonBernat-Adell 2021B+The week after running a marathon: Effects of running vs elliptical training vs resting on neuromuscular performance and muscle damage recoveryMartínez-Navarro 2021B-Adjusting a standard submaximal test so it ends at 86-93% of HRmax roughly halved the error of heart-rate recovery (typical error 6-7 → 3 bpm, CV ~11% → 4-5%) without changing HRR itselfLamberts RP 2011B+Systematic review of submaximal cycle tests: 12 studies, three distinct tests; predicted time to exhaustion, submaximal power, RPE and heart-rate recovery were the most useful variables, and the authors call for short, non-invasive, multivariable tests read togetherCapostagno B 2016B-Two days after an ultramarathon, trained runners on a standard submaximal treadmill test showed a lower heart rate at the same speeds, 7 bpm faster 60-s heart-rate recovery and higher RPEFatigue that looked like fitness on every heart-rate numberSiegl A 2017BDay-to-day variation in exercise heart rate falls as intensity rises: the lowest within-person variation, about 3 bpm, was at the end of a stage reaching 85-90% of HRmax, and HRR was least variable in the first minute after itLamberts RP 2009C+In six professional female cyclists on an 8-day training camp, the LSCT showed overreaching as higher power at the clamped heart rates plus higher RPE, and/or failure to reach 90% of HRmaxThe "better" power number was the fatigue sign; all values were back to baseline three days after the campDecroix L 2018C+In cyclists who did a two-week HIT block, heart-rate recovery rose in those whose 40-km time trial improved and fell in those whose did not; stage-2 power tended to rise only in the improversMaking HRR and stage-2 power the most sensitive LSCT markers of adaptation in this sampleCapostagno B 2021B-Cyclists whose four HIT sessions over two weeks were timed by a submaximal test improved their 40-km time trial by 48 ± 42 s, against 8 ± 45 s for cyclists on a fixed scheduleA large effect size in a small two-group studyCapostagno B 2014BA 15-minute submaximal cycle test (LSCT) was highly reliable in its second and third stages (ICC 0.85-1.00, typical error 1.3-4.4%), and mean power in stage 3 correlated with 40-km time-trial and peak power output at r = 0.91-0.94Far better than heart-rate recovery did (r = 0.55-0.68)Lamberts RP 2011B+Cold water works by cooling an overheated athlete, not by flushing metabolitesAnd the parasympathetic rebound that helps tomorrow can hurt a hard effort performed shortly afterwardsIhsan 2016C+Percussive Massage (Massage Gun)Acute ROM & stiffness effectsFukaya 2026BWearable technology metrics are associated with energy deficiency and psychological stress in elite swimmersLundstrom EA 2024