پژوهش در طب ورزشی و فناوری

مقایسه تأثیر انجام سه نوع تلاش ذهنی در طول فعالیت ورزشی رکاب‌زدن بر میزان شاخص‌های خستگی مردان دوچرخه‌سوار

نویسندگان

حمیدرضا برزگرپور 1
حمید رجبی 2
سعید محمدی 3
رعنا فیاض میلانی 4

1 دانشجوی دکتری فیزیولوژی دانشگاه شهید بهشتی، تهران، ایران.

2 استاد دانشگاه خوارزمی تهران، ایران.

3 کارشناس ارشد دانشگاه شهید بهشتی، تهران، ایران.

4 استادیار دانشگاه شهید بهشتی تهران، تهران، ایران.

https://doi.org/10.61186/jsmt.22.27.15
چکیده
زمینه و هدف: انجام تلاش ذهنی قبل و حین فعالیت ورزشی جسمانی باعث افزایش شاخص­های خستگی می­شود و به نظر می‌رسد که اندازه این خستگی به نوع تلاش ذهنی به‌کارگرفته‌شده بستگی داشته باشد. هدف پژوهش حاضر مقایسه تأثیر Stroop، AX-CPT و PVT هم­زمان با فعالیت ورزشی رکاب‌زدن بر درک تلاش، ضربان قلب و کورتیزول است. روش­شناسی: 10 مرد دوچرخه­سوار با میانگین سنی 5/4± 5/34 سال، قد 5/4± 177 سانتی­متر و حداکثر توان خروجی 36± 236 وات طی پنج جلسه به آزمایشگاه فراخوانده شدند. در جلسه­ی اول مشخصات آنتروپومتریک و آزمون تعیین حداکثر توان خروجی انجام شد. در چهار جلسه­ی بعد فعالیت ورزشی رکاب زدن به­مدت 45 دقیقه و با شدت 65 درصد حداکثر توان خروجی بر­روی چرخ کارسنج همراه (Stroop، AX-CPT و PVT) و بدون تلاش ذهنی (تماشای مستند) انجام شد. در حین انجام پروتکل درک تلاش و ضربان قلب هر 10 دقیقه توسط آزمونگر اندازه­گیری شد. همچنین نمونه­ی خونی قبل و 30 دقیقه بعد از فعالیت به­منظور اندازه­گیری کورتیزول جمع­آوری شد. برای تجزیه و تحلیل داده­ها از آزمون آنالیز تحلیل واریانس دو طرفه استفاده شد. نتایج: انجام 45 دقیقه تلاش ذهنی Stroop با فعالیت ورزشی رکاب زدن به‌صورت هم­زمان، باعث افزایش معنی­دار میزان درک تلاش، شاخص فشار ذهنی در پرسشنامه ناسا و غلظت کورتیزول نسبت به فعالیت ورزشی رکاب زدن تنها شد (p≤0/05) اما بین جلسات تلاش ذهنی AX-CPT و PVT با فعالیت ورزشی رکاب زدن تنها تفاوت معنی­داری یافت نشد. نتیجه­گیری: نتایج پژوهش نشان داد انجام تلاش­های ذهنی مختلف به­صورت هم­زمان با فعالیت ورزشی رکاب زدن بسته به میزان چالش و مدت زمان آن­ها می­توانند برخی شاخص­های خستگی را به میزان بیشتری تحت تاثیر قرار دهند.

کلیدواژه‌ها

درک تلاش
تلاش ذهنی
خستگی ذهنی
کورتیزول
فعالیت ورزشی رکاب‌زدن

عنوان مقاله English

Comparing The Effects Of Performing Three Mental Exertion During Cycling Exercise On Indicators Fatigue In Men Cyclist

نویسندگان English

Hamidreza Barzegarpoor 1
Hamid Rajabi 2
Saied Mohammadi 3
Rana Fayazmilani 4
1 Ph.D student at Shahid Beheshti University, Tehran.Iran.
2 Professor at Kharazmi University, Tehran.Iran.
3 MS.c student at Shahid Beheshti University, Tehran.Iran.
4 Assistant professor at Shahid Beheshti University, Tehran.Iran.
چکیده English

Performing a mental exertion before and during an exercise increase fatigue indices. One of the important factors in inducing fatigue indices is the type of mental effort engaged. So, the purpose of the present study is comparing the effects of performing types of mental exertion during cycling exercise on fatigue indicators. Methods: 10 cyclist men (with average age 34.5 ± 4.5 kg, height 177 ± 4.5cm, peak power output 236 ± 36 W) invited for 5 different sessions. In the first session, anthropometric characteristics and of cycling peak power output have determined. In the next four sessions, cycling for 45-min at 65% PPO on the cycle ergometer with (Stroop, AX-CPT and PVT) or without (watching a movie) mental exertion. Rate of perceived exertion and heart rate were recorded while cycling every 10 min and cortisol concentration was measured before and 30 min after exercise finished. Two-way repeated-measures ANOVAs were used to analyzing data. Results: Performing 45 minutes of Stroop mental exertion during cycling exercise increased effort perception, mental demand in the NASA questionnaire, and cortisol concentration compared to cycling exercise alone (P˂0/05) but there is no differences between AX-CPT and PVT to cycling exercise alone . Conclusion: The results of present study showed that performing different mental effort simultaneously with the cycling exercise depending on the amount of challenge and their duration may affect some of the fatigue indices.

کلیدواژه‌ها English

Rating of perceived exertion
Mental Exertion
Mental Fatigue
cortisol
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