Effects of one night's sleep deprivation on anaerobic performance the following day

Abstract

The purpose of this study was to determine the effect of one night's sleep deprivation on anaerobic performance in the morning and afternoon of the following day. Thirteen healthy males were studied twice in a balanced, randomized design. The experiment consisted of two conditions 1 week apart. In the sleep deprivation condition (SDN) subjects remained awake overnight and in the control condition (reference night, RN) the same subjects slept at home, retiring between 2230 and 2330 hours, as decided individually, and rising at 0500 hours. In both conditions, activity, sleep and diet were monitored by actimetry and daily activity and dietary diaries. Physical performance testing was carried out at 0600 hours and at 1800 hours after the one night of sleep and the one night of sleep deprivation. At each test occasion, subjects were measured for maximal power ( P(max)), peak power ( P(peak)) and mean power ( P(mean)). Blood lactate concentrations were measured at rest, at the end of the force-velocity ( F- V) test, just before and just after the Wingate test and again 5 min later. Oral temperatures were measured every 2 h. In both conditions, the results showed a circadian rhythm in temperature. Analysis of variance revealed a significant (sleep x time of day of test) interaction effect on P(peak), P(mean) and P(max). These variables improved significantly from morning to afternoon after RN and SDN. The reference night was followed by a greater improvement than the SDN. Up to 24 h of waking, anaerobic power variables were not affected; however, they were impaired after 36 h without sleep. Analysis of variance revealed that blood lactate concentrations were unaffected by sleep loss, by time of day of testing or by the interaction of the two. In conclusion, sleep deprivation reduced the difference between morning and afternoon in anaerobic power variables. Anaerobic performances were unaffected after 24 h of wakefulness but were impaired after 36 h without sleep.

Privação de sono e exercício físico

“…Souissi e colaboradores (73) (2003) observaram que o desempenho anaeróbio não foi afetado após 24 horas de vigília sustentada. No entanto, observaram modificações após 36 horas sem dormir.…”

Efeito de uma sessão de treinamento de força sobre a qualidade do sono de adolescentes

“…Existem evidências de que o excesso de atividades podem alterar parâmetros fisiológicos, e também o padrão de sono 28 . No caso dos exercícios, entretanto, existe uma relação em forma de "U" invertido entre a fadiga induzida pelo exercício e a qualidade do sono 28 .…”

“…Neste contexto, parece existir um consenso do não efeito da privação e ou má qualidade do sono no desempenho aeróbio, é importante ressaltar que, as dificuldades relacionadas a estes distúrbios, provocam um aumento significativo na percepção do esforço 27 , e uma redução do tempo para a exaustão, sendo que esses parâmetros afetam o desempenho aeróbio. Do mesmo modo, Souissi et al 28 observaram que o desempenho anaeróbio parece não ser afetado após 24 horas de vigília sustentada. No entanto, foram observadas modificações após 36 horas sem dormir.…”

“…No entanto, foram observadas modificações após 36 horas sem dormir. Além, disto, tem sido sugerido que a privação de sono não possui efeitos aparentes na força e na potência máxima 27 , na contração isométri-ca máxima 5 , na fadiga muscular e no trabalho total 28 . Contudo, apesar destes achados, os reais efeitos da privação de sono no desempenho físico ou fisiológico são conflitantes e/ou inconclusivos.…”

Effects of Eccentric Strength Training’s Time on Daily Plasma Testosterone Levels among Tunisian Sedentary Athletes

“…) or wingate (Souissi et al, 2003). Therefore, the gain of strength by following a muscle building are the result of a combination of multiple events, starting from control centers of the corticospinal areas and leading to the actuation bridges unions at the periphery.…”