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Episode SummarySleep is simultaneously the most oversold and the most underused recovery variable in strength and conditioning. Both of those things are true, and this episode explains why.I take the three studies you have seen on every sleep infographic and audit them honestly. The Stanford basketball sleep extension study had eleven athletes and no control group. The adolescent injury statistic everyone quotes has a confidence interval whose lower bound touches 1.0. The 2022 Sports Medicine meta-analysis reports a 7.5 percent performance decrement with 98 percent heterogeneity, which means the studies in it disagreed with each other almost completely.Then I show you where the evidence is not weak at all: the muscle biopsy data. One night of total sleep deprivation reduced muscle protein synthesis by 18 percent, raised cortisol 21 percent, and dropped testosterone 24 percent. Five nights of restriction at four hours in bed did the same thing, with one enormous exception. The group that was equally restricted but performed high intensity intervals maintained protein synthesis at control levels.That single finding overturns advice most coaches give. If your athlete slept four hours, the training may be part of what is protecting them. Do not send them home.The back half of the episode is implementation. A ranked intervention hierarchy, the two chemical inputs worth fixing, why the highest leverage sleep intervention in most programs is moving a 6 a.m. lift, why I have cooled on sleep trackers, and a four-week protocol you can run with a team starting Monday.WHAT YOU'LL LEARNWhy sleep is a permissive condition for adaptation, not a performance enhancer, and why that reframe changes how you interveneHow to read the three most quoted sleep studies in sport without overstating what they showThe mechanistic evidence on sleep loss and muscle protein synthesis, and its real limitsWhat to actually do with a training session after an athlete reports a bad nightWhy afternoon sessions are hit harder by sleep loss than morning sessionsA six tier intervention hierarchy ranked by effect divided by effortThe caffeine cutoff the research supports and almost nobody followsWhy consumer sleep trackers are least accurate on the number athletes care about mostA four week implementation protocol for a team or a private clientSTUDIES REFERENCEDMah CD, Mah KE, Kezirian EJ, Dement WC. The effects of sleep extension on the athletic performance of collegiate basketball players. SLEEP. 2011;34(7):943-950.Milewski MD, Skaggs DL, Bishop GA, Pace JL, Ibrahim DA, Wren TAL, Barzdukas A. Chronic lack of sleep is associated with increased sports injuries in adolescent athletes. Journal of Pediatric Orthopaedics. 2014;34(2):129-133.Craven J, McCartney D, Desbrow B, Sabapathy S, Bellinger P, Roberts L, Irwin C. Effects of acute sleep loss on physical performance: a systematic and meta-analytical review. Sports Medicine. 2022;52(11):2669-2690.Lamon S, Morabito A, Arentson-Lantz E, et al. The effect of acute sleep deprivation on skeletal muscle protein synthesis and the hormonal environment. Physiological Reports. 2021;9(1):e14660.Saner NJ, Lee MJ-C, Pitchford NW, et al. The effect of sleep restriction, with or without high-intensity interval exercise, on myofibrillar protein synthesis in healthy young men. Journal of Physiology. 2020;598(8):1523-1536.Nedeltcheva AV, Kilkus JM, Imperial J, Schoeller DA, Penev PD. Insufficient sleep undermines dietary efforts to reduce adiposity. Annals of Internal Medicine. 2010;153(7):435-441.Drake C, Roehrs T, Shambroom J, Roth T. Caffeine effects on sleep taken 0, 3, or 6 hours before going to bed. Journal of Clinical Sleep Medicine. 2013;9(11):1195-1200. Chinoy ED, Cuellar JA, Huwa KE, et al. Performance of seven consumer sleep-tracking devices compared with polysomnography. SLEEP. 2021;44(5):zsaa291.Baron KG, Abbott S, Jao N, Manalo N, Mullen R. Orthosomnia: are some patients taking the quantified self too far? Journal of Clinical Sleep Medicine. 2017;13(2):351-354.DISCLAIMERThis podcast is for educational and informational purposes only and should not be considered medical, fitness, or professional advice. Always consult with qualified healthcare and fitness professionals before making changes to your training, supplementation, nutrition, or health practices. Individual results may vary. The host and producers are not responsible for any adverse effects or consequences resulting from the use of any information, suggestions, or procedures discussed in this podcast.Subscribe & Review:If this episode added value to your training knowledge, please subscribe and leave a 5-star review! Your feedback helps us reach more fitness enthusiasts, coaches, lifters, athletes or anyone who can benefit from quality training information.About Brandon SmitleyInstagram: @bsmitley @team.thirstSubscribe On YouTube!Website: THIRSTgym.comMy FREE Newsletter — training insights, programming education & no-fluff content ...
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