نوع مقاله : مقاله پژوهشی Released under CC BY-NC 4.0 license I Open Access I

نویسندگان

1 نویسندۀ مسئول، گروه تربیت بدنی و علوم ورزشی، دانشکدۀ ادبیات و علوم انسانی، دانشگاه آزاد اسلامی واحد کرمان، کرمان، ایران.

2 گروه تربیت بدنی و علوم ورزشی، دانشکدۀ ادبیات و علوم انسانی، دانشگاه آزاد اسلامی واحد کرمان، کرمان، ایران.

چکیده

مقدمه: ثابت شده است ریخت شبانه‌روزی نقش کلیدی در زمان‌بندی اوج عملکرد ورزشی دارد. شواهد اخیر نشان می‌‌دهد محاسبة این تفاوت‌‌ها، که به‌عنوان ریخت شبانه‌روزی شناخته می‌شود، به نمایه‌‌های فیزیولوژیک روزانة متفاوت منجر می‌‌شود. هدف از تحقیق حاضر، بررسی تأثیر ریخت شبانه‌روزی بر حداکثر اکسیژن مصرفی، ملاتونین و دمای بدن فوتبالیست‌های نوجوان باشگاه مس کرمان بود.
روش پژوهش: در این تحقیق نیمه‌تجربی، 30 مرد فوتبالیست نوجوان باشگاه صنعت مس کرمان با میانگین سنی 26/16 سال به‌عنوان نمونه انتخاب شدند. بر اساس پرسشنامة صبح‌گاهی – عصر‌گاهی (MEQ)، آزمودنی‌ها به ریخت شبانه‌روزی نوع صبح‌گاهی و عصر‌گاهی تقسیم شدند. به‌منظور اجرای آزمون فزاینده روی نوار گردان، آزمودنی‌ها سه جلسه در آزمایشگاه حضور یافتند (ساعات 7-9 صبح و 6-8 عصر). پیش  از اجرای آزمون، سطح ملاتونین خون و دمای بدن و طی اجرای آزمون، اکسیژن مصرفی آزمودنی‌ها اندازه‌گیری شد.
یافته‌ها: در مورد گروه صبح‌گاهی، بین حداکثر اکسیژن مصرفی و ملاتونین شرایط صبح و عصر تفاوت معناداری مشاهده نشد (05/0P>)، اما در شرایط عصر نسبت به صبح، دمای بدن افزایش معناداری را نشان داد (005/0P<). در مورد گروه عصر‌گاهی، بین ملاتونین شرایط صبح و عصر تفاوت معناداری وجود نداشت (05/0P>)، اما در شرایط عصر نسبت به صبح، دمای بدن (023/0P<) و حداکثر اکسیژن مصرفی (001/0P<) افزایش معناداری را نشان داد.
نتیجه‌گیری: به‌نظر می‌رسد ریخت شبانه‌روزی بر ظرفیت هوازی ورزشکاران تأثیرگذار است. در افراد با ریخت شبانه‌روزی نوع عصرگاهی و در ساعات فعالیت بدنی عصر، در مقایسه با فعالیت بدنی در ساعات صبح، ظرفیت هوازی بیشتر است.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of Chronotype on the Maximum Oxygen Consumption, Melatonin, and Body Temperature of Young Football Players of Sanat Mes Kerman Club

نویسندگان [English]

  • yahya Asefi 1
  • mohammad abrizegan 2

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

چکیده [English]

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.

کلیدواژه‌ها [English]

  • athletes
  • body temperature
  • chronotype
  • maximum oxygen consumption

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