The Effect of Detraining After a Period of Resistance Training on Corticospinal Excitability Pathway of Arm Muscles

سال انتشار: 1400
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 136

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شناسه ملی سند علمی:

JR_SOREN-2-3_004

تاریخ نمایه سازی: 30 مرداد 1401

چکیده مقاله:

Background and aim: Due to the role of neural adaptations in strength changes following detraining, this study aimed to determine the adaptations of corticospinal excitatory pathways in agonist and antagonist arm muscles after ۴ weeks of detraining, after a period of resistance training using TMS variables. Methods: ۱۲ healthy untrained individuals (training group (N=۱۰) and pilot group (N=۲)) with a mean age of ۲۸.۰۰ ± ۲.۰۴ years and a weight of ۷۰.۹۱±۸.۵۲ kg voluntarily participated in this study. At week ۰ (pre-test), week ۴ of training, week ۲ of detraining, and week ۴ of detraining, arm circumference (AURC), ۱- RM, Co-activation, and corticospinal excitability (MEP) were measured. Results: The results of the present study showed that strength in agonist's muscle had a significant reduction (۱۰%) after ۴ weeks of detraining. The antagonist muscle, similar to the agonist's muscle, responded to detraining (۲.۵% in week ۲ and ۸% in week ۴ of detraining). Also, ۴ weeks of detraining was associated with a decrease in MEP in both muscles (p =۰.۰۰۳). The results of linear regression showed that strength changes were not related to excitability in both muscles. Conclusion: The results of this study showed that corticospinal responses to detraining in the upper body are not limited to trained muscles and detraining reduces corticospinal excitatory pathway, but no difference was observed between agonist and antagonist muscles in this period.

نویسندگان

Aref Basereh

Department of Exercise Physiology, Kharazmi University, Tehran, Iran

Hamid Rajabi

Department of Exercise Physiology, Kharazmi University, Tehran, Iran

Shahriar Gharibzadeh

Department of cognitive psychology, Institute of Cognitive and Brain Sciences, Shahid Beheshti University, Tehran, Iran

Masoud Afshari

Department of cognitive psychology, Institute of Cognitive and Brain Sciences, Shahid Beheshti University, Tehran, Iran