Ciorciari Andrea, Castelli Lucia, Galasso Letizia, Mulè Antonino, Esposito Fabio, Roveda Eliana, Montaruli Angela
Department of Biomedical Sciences for Health, University of Milan, Milan, Italy.
Faculty of Education, Free University of Bozen-Bolzano, Brixen-Bressanone, Italy.
Front Sports Act Living. 2024 Jul 30;6:1443804. doi: 10.3389/fspor.2024.1443804. eCollection 2024.
Social jetlag (SJL), resulting from misalignment between biological rhythms and social schedules, has emerged as a prevalent phenomenon in modern society, particularly among young athletes. However, the effect of SJL on performance is poorly studied. Jump and dynamic balance are two key skills in volleyball, as the first allows the player to perform better both during the offense and defense phase, and the second is fundamental in landing and in injury prevention. Therefore, our aim was to investigate the effect of SJL on jump skill performance and balance in female volleyball players. Thirty female volleyball players (mean age: 17.3 ± 0.88 years) participated in the study. SJL was assessed using the Munich ChronoType Questionnaire (MCTQ), integrated with Jankowsky's sleep-corrected formula. Jump skill performance was evaluated using a standardized jump test, the Vertec Jump Test, while balance was assessed with the Y Balance Test. The tests were performed at 09:00 a.m. and at 06:00 p.m. The results revealed that players with greater SJL exhibited decreased jump performance, characterized by lower vertical jump height ( = 0.02). Furthermore, players with lower SJL showed the typical difference between morning and afternoon performance ( = 0.001), demonstrating their synchronization between biological rhythms and social commitments, while no statistically significant difference between the two sessions was shown in players with higher SJL. Regarding balance, no significant association with SJL was found, but the morning session yielded lower results than the afternoon one ( = 0.01). These findings highlight the detrimental impact of SJL on jump skill performance, underscoring the importance of optimizing sleep-wake schedules and circadian alignment to enhance athletic performance. Future research should explore targeted interventions, such as sleep hygiene education, to minimize social jetlag and promote optimal performance in adolescent athletes.
社会时差（SJL）是由生物节律与社会日程安排不一致所导致的，已成为现代社会中的一种普遍现象，尤其是在年轻运动员中。然而，社会时差对运动表现的影响却鲜有研究。跳跃和动态平衡是排球运动中的两项关键技能，因为前者能让运动员在进攻和防守阶段都表现得更好，而后者对于落地和预防受伤至关重要。因此，我们的目的是研究社会时差对女排运动员跳跃技能表现和平衡能力的影响。30名女排运动员（平均年龄：17.3±0.88岁）参与了该研究。使用慕尼黑时间类型问卷（MCTQ）并结合扬科夫斯基的睡眠校正公式来评估社会时差。使用标准化跳跃测试——Vertec跳跃测试来评估跳跃技能表现，同时用Y平衡测试来评估平衡能力。测试分别在上午9点和下午6点进行。结果显示，社会时差较大的运动员跳跃表现下降，其特征是垂直跳跃高度较低（=0.02）。此外，社会时差较小的运动员在上午和下午的表现存在典型差异（=0.001），这表明他们的生物节律与社会活动之间相互同步，而社会时差较大的运动员在这两个时间段之间未表现出统计学上的显著差异。关于平衡能力，未发现与社会时差有显著关联，但上午测试的结果低于下午测试（=0.01）。这些发现凸显了社会时差对跳跃技能表现的不利影响，强调了优化睡眠-觉醒时间表和昼夜节律同步以提高运动表现的重要性。未来的研究应探索有针对性的干预措施，如睡眠卫生教育，以尽量减少社会时差并促进青少年运动员的最佳表现。
