Multidisciplinary Laboratory in Education Sciences and Training Engineering (LMSEIF), Sport Science Assessment and Physical Activity Didactic, Normal Higher School (ENS-C), Hassan II University of Casablanca, BP 50069, Morocco.
Ann Ig. 2023 Nov-Dec;35(6):683-694. doi: 10.7416/ai.2023.2574.
Ramadan observance has been practiced by many faith groups and cultures worldwide. Mo-reover, recently, it has been adopted as a natural alternative to promote public health. During Ramadan, our circadian rhythm can be altered. This study investigates how athletes' chronotype and sleep patterns impact aerobic fitness during Ramadan intermittent fasting.
A prospective cohort design with repeated measurements was adopted. We measured the chronotype, maximal Oxygen Uptake as a measure of aerobic performance, and sleep patterns before and during Ramadan intermittent fasting. Then we explored the correlation among these variables.
50 amateur athletes (Mean age = 17.22 years SD = 1.15) from Morocco participated in this study. The maximal Oxygen Uptake was measured with the 20-m shuttle-run test. The chronotype was assessed by the Morningness-Eveningness Questionnaire. The sleep timing was assessed by Sleep Timing Question-naire. We also assessed sleep quality with the Pittsburgh Sleep Quality Index. We examined the difference between variable means before and during Ramadan, also considering chronotype and sleep patterns of participants.
The results showed a significant decrease in sleep quality and maximal Oxygen Uptake during the Ramadan Intermittent Fasting. Also, we found a significant correlation between the chronotype, time in bed and time spent asleep. However, chronotype and sleep quality did not affect maximal Oxygen Uptake during the Ramadan intermittent fasting.
Sleep and chronotype do not influence physical performance during Ramadan Intermittent Fasting. More research is needed to identify the leading cause of the drop in aerobic performance.
斋月的禁食习俗在世界范围内的许多信仰群体和文化中都有实行。此外，最近它已被作为促进公众健康的自然替代方法而被采用。在斋月期间，我们的昼夜节律可能会发生改变。本研究调查了运动员的昼夜类型和睡眠模式如何影响斋月间歇性禁食期间的有氧运动能力。
采用前瞻性队列设计和重复测量。我们在斋月间歇性禁食前后测量了昼夜类型、最大摄氧量（作为有氧运动能力的衡量标准）和睡眠模式，并探讨了这些变量之间的相关性。
来自摩洛哥的 50 名业余运动员（平均年龄=17.22 岁，标准差=1.15）参与了这项研究。最大摄氧量通过 20 米往返跑测试进行测量。昼夜类型通过 Morningness-Eveningness Questionnaire 进行评估。睡眠时间通过睡眠定时问卷进行评估。我们还使用匹兹堡睡眠质量指数评估了睡眠质量。我们检查了在斋月前后变量均值之间的差异，同时考虑了参与者的昼夜类型和睡眠模式。
结果显示，在斋月间歇性禁食期间，睡眠质量和最大摄氧量显著下降。此外，我们发现昼夜类型、卧床时间和入睡时间之间存在显著相关性。然而，昼夜类型和睡眠质量并不影响斋月间歇性禁食期间的最大摄氧量。
睡眠和昼夜类型不会影响斋月间歇性禁食期间的身体表现。需要进一步研究以确定有氧运动能力下降的主要原因。
