The Effect of Local Fatigue in Core Stability Muscles on Selected Biomechanical Variables of Upper Limb in Professional Women Rowers

Subject Areas : Effects of Movement and Exercise in Health

Soraya Abyar ¹ (1. Department of sports Biomechanics, Central Tehran Branch, Islamic Azad University, Tehran, Iran)
Ali Fatahi ² (Department of Sports Biomechanics, Central Tehran Branch,, Islamic Azad university, Tehran. Iran)
Razieh Yousefian Molla ³ (Department of Physical Education and Sports Sciences, Faculty of Physical Education and Sports Sciences, Islamic Azad university Karaj Branch, Karaj, Iran)

Received: 2023-01-16 Accepted : 2023-02-10 Published : 2022-12-22

Keywords: Fatigue, biomechanics, core stability, Rowing, Dragon Boat,

Abstract :

Since fatigue caused by repetitive sport movements impairs the rate of muscle force development and rate of muscle contraction, and its modification is associated with variables such as age, injury, type and level of physical activity, the aim of this study was to investigate the effect of localized fatigue on stabilizing muscles on selected biomechanical variables of the upper limbs in professional rowers. Twenty professional Dragon Boat rowers participated in the present study as subjects. Five biomechanical-functional parameters including stability, balance, endurance, strength and flexibility of the upper limb in these subjects were taken as a pre-test at the beginning of the study. Then, the adjusted fatigue protocol was given to the core stability muscles and trunk of the subjects and all of them underwent post-test again. Finally, paired t-test was used to compare the two stages of pre-test and post-test. The results showed that in stability, endurance and strength, significant increase, in flexibility, significant decrease was observed between pre and post-tests, respectively. No significant differences exist between pre and post-tests in balance test (p ≤ 0.05). It is recommended that professional level coaches and rowers’ athletes, regarding biomechanics of movements, pay attention to appropriate preparations and execute training and drills that improve the strength of the core muscles and increase their ability to cope with fatigue.