One night of sleep deprivation decreases treadmill endurance performance

Oliver, Samuel J.; Costa, Ricardo J. S.; Laing, Stewart J.; Bilzon, James L. J.; Walsh, Neil P.

doi:10.1007/s00421-009-1103-9

Cited by 157 publications

(115 citation statements)

References 21 publications

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“…On day two, 29 h into each trial, 90 min walk RPE was similar on CON and SDEP (11 ± 2 and 12 ± 2, P = 0.13); however, RPE was higher than CON after SDEP+ER (15 ± 3, P < 0.01). Time taken to complete the 5 km time trial was longer after SDEP+ER (1961 ± 682 s, P = 0.04) and SDEP (1465 ± 278 s, P = 0.01) than CON (1401 ± 290 s), which agrees with similar studies in our laboratory to examine the effects of sleep loss and energy restriction on endurance performance (Oliver et al 2007;Oliver et al 2009). As on day 1, final 5 km time trial RPE on day 2 was similar on all trials (19 ± 1, P = 0.16), indicating maximal or very near maximal effort during the daily exercise.…”

Section: Trial Sleep Duration and Physical Activitysupporting

confidence: 89%

Two nights of sleep deprivation with or without energy restriction does not impair the thermal response to cold

et al. 2015

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PurposeIn persons completing exhaustive daily exercise, sleep and energy restriction have been highlighted as risk factors for hypothermia in cold environments. The present study therefore sought to determine the effect of sleep deprivation (SDEP), with and without energy restriction, on the thermal response to cold. MethodsIn a random order, ten recreationally active men (means ± SD: age 25 ± 6 y, body fat 17 ± 5%) completed CAT Tre (P = 0.78). In contrast, perceived thermal discomfort during the initial hour of the CAT tended to be greater after SDEP and SDEP+ER (P ≤ 0.1). ConclusionSleep and energy restriction, at least as evaluated within this experiment, should be considered minimal risk factors for hypothermia. The greater perception of cold discomfort at the same body temperature suggests that sleep and energy restriction may actually reduce cold injury risk, as people are likely to engage earlier in normal behavioural cold adaptation.

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Section: Trial Sleep Duration and Physical Activitysupporting

confidence: 89%

Two nights of sleep deprivation with or without energy restriction does not impair the thermal response to cold

et al. 2015

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“…Previous studies report 5-6 days of dietary supplementation with larger doses is necessary to achieve significant increases in muscle Cr levels (Harris et al 1992;Hultman et al 1996). Nevertheless, these are potentially important findings needing replication as sleep deprivation in athletes seems to affect skill performance more than other components of performance (Blumert et al 2007;Edwards and Waterhouse 2009;Oliver et al 2009). …”

Section: Cr Supplementation and Cognitive Enhancement -Effects On Slementioning

confidence: 99%

The effects of creatine supplementation on thermoregulation and physical (cognitive) performance: a review and future prospects

et al. 2016

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Creatine (Cr) is produced endogenously in the liver or obtained exogenously from foods such as meat and fish.In the human body, 95% of Cr is located in the cytoplasm of skeletal muscle either in a phosphorylated (PCr) or free form (Cr). PCr is essential for the immediate rephosphorylation of adenosine di-phosphate (ADP) to adenosine tri-phosphate (ATP). PCr is rapidly degraded at the onset of maximal exercise at a rate that results in muscle PCr reservoirs being substantially depleted. A well-established strategy followed to increase muscle total Cr content is to increase exogenous intake by supplementation with chemically pure synthetic Cr.

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“…One such stressor that is often added to heat stress in military and athletic settings is sleep loss or deprivation. Several studies have shown that mild sleep loss (24-30 h) detrimentally influences exercise time to exhaustion and thermoregulatory responses (Sawka et al 1984;Born et al 1997;Zhong et al 2005;Oliver et al 2009). Very little is known, however, about the effects of sleep loss on heat shock proteins.…”

Section: Introductionmentioning

confidence: 96%

Eleven days of moderate exercise and heat exposure induces acclimation without significant HSP70 and apoptosis responses of lymphocytes in college-aged males

Hom

Lee

Apicella

et al. 2012

Cell Stress and Chaperones

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The purpose of this study was to assess whether a lymphocyte heat shock response and altered heat tolerance to ex vivo heat shock is evident during acclimation. We aimed to use flow cytometry to assess the CD3(+)CD4(+) T lymphocyte cell subset. We further aimed to induce acclimation using moderately stressful daily exercise-heat exposures to achieve acclimation. Eleven healthy males underwent 11 days of heat acclimation. Subjects walked for 90 min (50 ± 8% VO(2max)) on a treadmill (3.5 mph, 5% grade), in an environmental chamber (33°C, 30-50% relative humidity). Rectal temperature (°C), heart rate (in beats per minute), rating of perceived exertion , thermal ratings, hydration state, and sweat rate were measured during exercise and recovery. On days 1, 4, 7, 10, and 11, peripheral blood mononuclear cells were isolated from pre- and post-exercise blood samples. Intracellular and surface HSP70 (SPA-820PE, Stressgen, Assay Designs), and annexin V (ab14085, Abcam Inc.), as a marker of early apoptosis, were measured on CD3(+) and CD4(+) (sc-70624, sc-70670, Santa Cruz Biotechnology) gated lymphocytes. On day 10, subjects experienced 28 h of sleep loss. Heat acclimation was verified with decreased post-exercise rectal temperature, heart rate, and increased sweat rate on day 11, versus day 1. Heat acclimation was achieved in the absence of significant changes in intracellular HSP70 mean fluorescence intensity and percent of HSP70(+) lymphocytes during acclimation. Furthermore, there was no increased cellular heat tolerance during secondary ex vivo heat shock of the lymphocytes acquired from subjects during acclimation. There was no effect of a mild sleep loss on any variable. We conclude that our protocol successfully induced physiological acclimation without induction of cellular heat shock responses in lymphocytes and that added mild sleep loss is not sufficient to induce a heat shock response.

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One night of sleep deprivation decreases treadmill endurance performance

Cited by 157 publications

References 21 publications

Two nights of sleep deprivation with or without energy restriction does not impair the thermal response to cold

Two nights of sleep deprivation with or without energy restriction does not impair the thermal response to cold

The effects of creatine supplementation on thermoregulation and physical (cognitive) performance: a review and future prospects

Eleven days of moderate exercise and heat exposure induces acclimation without significant HSP70 and apoptosis responses of lymphocytes in college-aged males

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