Chronotype, sleep, and perceived exertion during intermittent fasting in young athletes

Abstract

During intermittent fasting of Ramadan, research has shown a modification in athletes’ sleep habits and lifestyle. As a result, these changes might affect a range of chronobiological and psychological parameters. Thus, the present study explores the effect of intermittent fasting during Ramadan and circadian preference on sleep patterns and perception after aerobic exercise. This study included ninety-six active students (16.94 ± 1.09 years, BMI: 21.59 ± 3.52kg/m2). We identified the circadian preferences by exploiting Morningness-Eveningness Questionnaire (MEQ). Then we assess the perceived exertion at three-point times by using Rating of perceived exertion scale (RPE) after an aerobic exercise. At the end of Ramadan, we assess the sleep quality by using The Pittsburgh Sleep Quality Index (PSQI). Our analysis revealed that perceived exertion increased significantly during the three-time points, but sleep quality and maximal oxygen uptake decreased. Also, the results showed a significant association between chronotype and perceived exertion during Ramadan. Moreover, a meaningful prediction was detected of maximal oxygen uptake from BMI and perceived exertion. The main conclusion is that intermittent fasting affects sleep patterns, perceived exertion, and aerobic performance.