| Intermittent-Sprint Performance and Muscle Glycogen Following 30 H Sleep Deprivation. | |
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MedLine Citation:
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PMID: 21200339 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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PURPOSE:: The aim of this study was to determine the effects of 30h sleep deprivation on consecutive day intermittent-sprint performance and muscle glycogen content. METHODS:: Ten male, team-sport athletes performed a single day 'baseline' session, and two consecutive-day experimental trials separated either by a normal night's sleep (CONT1 and CONT2) or no sleep (SDEP1 and SDEP2). Each session included a 30min graded exercise run (GXR) and 50min intermittent-sprint exercise (ISE) protocol, including a 15m maximal sprint every minute and self-paced exercise bouts of varying intensities. Muscle biopsies were extracted pre and post exercise during the baseline session and pre-exercise on Day 2 during experimental trials. Voluntary force (VF) and activation (VA) of the right quadriceps, nude mass, heart rate (HR), core temperature (Tcore), capillary blood lactate (La-) and glucose (Glu), rating of perceived exertion (RPE) and a modified Profile of Mood States (POMS) were recorded pre, post and during the exercise protocols. RESULTS:: Mean sprint times were slower on SDEP2 (2.78 ± 0.17 s) compared to SDEP1 (2.70 ± 0.16) and CONT2 (2.74 ± 0.15; P >0.05). Distance covered during self-paced exercise was reduced during SDEP2 during the initial 10 min compared to SDEP1 and during the final 10min compared to CONT2 (P> 0.05). Muscle glycogen concentration was lower pre-exercise on SDEP2 (209 ± 60mmol/kg dw) compared to CONT2 (274 ± 54mmol/kg dw; P= 0.05). VF and VA were reduced on Day2 of both conditions; however were lower in SDEP2 compared to CONT2 (P> 0.05). Sleep loss did not affect RPE but negatively affected POMS ratings (P> 0.05). CONCLUSION:: Sleep loss and associated reductions in muscle glycogen and perceptual stress reduced sprint performance and slowed pacing strategies during intermittent-sprint exercise for male team-sport athletes. |
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Authors:
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Melissa Skein; Rob Duffield; Johann Edge; Michael J Short; Toby Mündel |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2010-12-21 |
Journal Detail:
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Title: Medicine and science in sports and exercise Volume: - ISSN: 1530-0315 ISO Abbreviation: - Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2011-1-4 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8005433 Medline TA: Med Sci Sports Exerc Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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1School of Human Movement Studies, Charles Sturt University, Panorama Ave, Bathurst, NSW, AUSTRALIA, 2795; 2Department of Sport and Exercise, The University of Auckland, Auckland, NEW ZEALAND; 3Institute of Food, Nutrition, and Human Health, Massey University, Palmerston North, NEW ZEALAND; †deceased. |
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