Document Type : Research Paper I Open Access I Released under CC BY-NC 4.0 license

Authors

1 Corresponding Author, Department of Physical Education and Sports Science, Faculty of Literature and Human Sciences, Islamic Azad University, Kerman Branch, Kerman, Iran

2 Department of Physical Education and Sports Science, Faculty of Literature and Human Sciences, Islamic Azad University, Kerman Branch, Kerman, Iran

Abstract

Introduction: It has been proven that the chronotype plays a key role in the timing of peak sports performance. Recent evidence suggests that investigating these differences, which are known as chronotypes, leads to different daily physiological profiles. This research aimed to investigate the effect of chronotype on the maximum oxygen consumption (Vo2max), melatonin, and body temperature of the youth football players of Sanat Mes Kerman Club.
Methods: In this quasi-experimental research, 30 young male football players of Sanat Mes Kerman Club with a mean age of 16.26 years old were selected as statistical samples. Based on the Morningness-Eveningness Questionnaire (MEQ), participants were classified into morning and evening types. To perform the incremental treadmill test, participants attended three sessions in the laboratory (7:00 to 9:00 in the morning and 6:00 to 8:00 in the evening). The participants’ blood melatonin levels and body temperature were measured before performing the test and the oxygen consumption was measured during the test.
Results: In the morning type group, there was no significant difference between Vo2max and melatonin in the morning and evening conditions (p>0.05), but in the evening type group the body temperature showed a significant increase compared to the morning type group (p<0.005). In the evening type group, there was no significant difference between melatonin levels in morning and evening conditions (p>0.05), but in the evening type group, the body temperature (p<0.023) and Vo2max (p<0.001) showed a significant increase compared with the morning type group.
Conclusion: It seems that the chronotype affects the aerobic capacity of athletes. In people with evening type chronotype, aerobic capacity is sometimes higher during the evening physical activity hours compared with the morning physical activity.

Keywords

Main Subjects

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