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THE JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS
Rivista di Medicina, Traumatologia e Psicologia dello Sport
Indexed/Abstracted in: Chemical Abstracts, CINAHL, Current Contents/Clinical Medicine, EMBASE, PubMed/MEDLINE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 1,111
The Journal of Sports Medicine and Physical Fitness 2016 May 31
Effects of one night sleep deprivation on selective attention and isometric force in adolescent Karate athletes
Ridha BEN CHEIKH 1-3, Imed LATIRI 4, Mohamed DOGUI 1-3, Helmi BEN SAAD 4, 5 ✉
1 Unit of Sleep Disorders, Department of Functional Exploration of Nervous System, Sahloul University Hospital Center 4054 Sousse,Tunisia; 2 Research Laboratory Technology and Medical Imagery LR12ES06, Faculty of Medicine of Monastir, University of Monastir, Tunisia; 3 Laboratory of Physiology, Monastir Faculty of Medicine, University of Monastir, Tunisia; 4 Laboratory of Physiology, Faculty of Medicine of Sousse, University of Sousse, Tunisia; 5 Department of Physiology and Functional Exploration, Farhat Hached University Hospital of Sousse, Tunisia
BACKGROUND: Most of the available literature related to aspects of sleep-deprivation is primarily focused on memory and learning and studies regarding its effects on selective- attention and/or physical performance especially the isometric-force are scarce. Moreover, the available literature included general population or some team sports (eg; volleyball). However, only few studies were done on athletes involved in combat sports (eg; Karate). The aim of the present study was to determine the effects of a total one-night-sleep- deprivation (NSD) on activator- and inhibitor-processes of selective-attention and on maximal-isometric-force in Karate athletes.
METHODS: Twelve Karate boys (age mean±SD: 16.9±0.8 Yrs) were included. The protocol consists of two successive sessions: a normal-night-sleep (NNS) and a total one- NSD. After each night, athletes performed selective-attention and muscle-strength-tests during the same following three periods (P) of the day: P1NNS or P1NSD: 8-9 am; P2NNS or P2NSD: 12 am-1 pm; P3NNS or P3NSD: 4-5 pm. The activator [simple- and choice-reaction- times (SRT, CRT, respectively)] and inhibitor (negative-priming) processes were evaluated “Superlab4.5 software, Cedrus, San Pedro, USA”. Maximal-force and maximal-force-time (MFT) of brachial biceps isometric-contraction were evaluated (dynamometer Globus ergo system®; Italy). Data were expressed as mean±SD. A non-parametric test was used to evaluate the sessions (NNS vs. SND for the same period) and time (P1NNS vs. NSD periods’) effects.
RESULTS: All athletes completed tests realized after NNS. 12, 11 and 4th athletes finished, respectively, P1NSD, P2NSD and P3NSD. Sessions effects: no statistical significant difference was found. Time effects: i) Significant increase of SRT at P2NSD vs. P1NNS (respectively, 345±47 vs. 317±33 ms); ii) Significant increase of MFT at P2NSD vs. P1NNS (respectively, 2172±260 vs.1885±292 ms) and iii) No significant changes of CRT; negative- priming reaction-time or MFT data.
CONCLUSION: Total one-NSD affects both activator-processes of selective-attention and maximal-isometric-strength, two qualities often used in Karate sports.