Research Unit Physical Activity, Sport and Health (UR18JS01), National Observatory of Sports, Tunis, Tunisia.
High Institute of Sport and Physical Education, Ksar-Saïd, Manouba University, Manouba, Tunisia.
Chronobiol Int. 2022 Dec;39(12):1542-1553. doi: 10.1080/07420528.2022.2132165. Epub 2022 Oct 21.
To explore the effect of time of day (TOD) on several components of cognitive performance prior and post to a physically exhaustive task in a sample of adolescent elite athletes. In a counterbalanced and randomized order, fourteen highly trained male karate athletes (17 ± 0.96 years; 1.75 ± 0.07 m; 68.0 ± 9.50 kg; BMI 22.15 ± 0.54 kg.m) completed two test sessions at 09h00 and 16h00. Cognitive performance was evaluated before and after the karate specific test (KST). During each session, participants completed the profile of mood state (POMS), simple (SRT) and choice (CRT) reaction times, comparison test (COMT), mental rotation test (MRT), egocentric distance estimation (DE), and the rating of perceived exertion (RPE). KST was not TOD dependent (p > .05, d = 0.33). RPE scores were higher in the afternoon compared to the morning (p < .05, d = 0.68). Before the KST, SRT (p < .01, d = 0.69), CRT (p < .01, d = 0.47), COMT (p < .01, d = 0.62) and MRT (p < .001, d = 0.65) were better in the afternoon than in the morning. However, DE was not affected by the TOD (P > .05). KST improved SRT (p < .01, d = 0.078), CRT (p < .001, d = 0.72), COMT (p < .001, d = 1.31) and MRT (p < .001, d = 0.80) performances only in the morning. Cognitive performances are TOD dependent with higher performances realized in the afternoon. Performing a high intensity exercise in the morning, but not in the afternoon, enhanced several aspects of cognitive performances. The current results indicate that an intensive warm-up could be beneficial when a morning competition requires high cognitive readiness.
探讨在青少年精英运动员样本中，在进行体力消耗任务前后，时间（TOD）对认知表现的几个成分的影响。按照平衡和随机顺序，14 名高度训练的男性空手道运动员（17±0.96 岁；1.75±0.07 米；68.0±9.50 公斤；BMI 22.15±0.54 公斤.m）在 09 点和 16 点分别进行了两次测试。在空手道专项测试（KST）前后评估认知表现。在每次测试中，参与者完成了心境状态问卷（POMS）、简单（SRT）和选择（CRT）反应时间、比较测试（COMT）、心理旋转测试（MRT）、自我中心距离估计（DE）和主观用力感觉等级（RPE）。KST 不受 TOD 影响（p>.05，d=0.33）。与上午相比，下午的 RPE 评分更高（p<.05，d=0.68）。在 KST 之前，SRT（p<.01，d=0.69）、CRT（p<.01，d=0.47）、COMT（p<.01，d=0.62）和 MRT（p<.001，d=0.65）在下午比在上午更好。然而，DE 不受 TOD 的影响（P>.05）。KST 提高了 SRT（p<.01，d=0.078）、CRT（p<.001，d=0.72）、COMT（p<.001，d=1.31）和 MRT（p<.001，d=0.80）的表现，仅在上午。认知表现受 TOD 影响，下午表现更好。上午进行高强度运动，但下午不进行运动，可以增强认知表现的几个方面。目前的结果表明，当上午的比赛需要高度的认知准备时，进行强化热身可能是有益的。
