AN EXAMINATION OF FATIGUE INDEX AND VELOCITY-RELATED FORCE LOSS FOR THE FOREARM FLEXORS

作者：Carr Joshua C^*; Beck Travis W; Ye Xin; Wages Nathan P

来源：Journal of Strength and Conditioning Research, 2015, 29(8): 2304-2309.

DOI：10.1519/JSC.0000000000000879

• relative power
• torque decline
• isokinetic

Carr, JC, Beck, TW, Ye, X, and Wages, NP. An examination of fatigue index and velocity-related force loss for the forearm flexors. J Strength Cond Res 29(8): 2304-2309, 2015The purpose of this study was to examine the relationship between the fatigue index from an isokinetic fatigue test and the velocity-related decrease in peak torque for the forearm flexors. After a familiarization session, 13 habitually active males (mean +/- SD, age = 23.8 +/- 3.1 years) reported to the laboratory to perform either 50 repeated, maximal, concentric isokinetic muscle actions of the dominant forearm flexors at a velocity of 180 degrees s(-1) or 6 separate sets of 3 maximal concentric isokinetic muscle actions at randomly ordered velocities of 30, 90, 150, 270, and 330 degrees s(-1). The correlation between the relative percent declines in peak torque during the 2 isokinetic tests was then examined. The results indicated an inverse relationship (r = -0.75, p < 0.01) between these 2 variables. That is, the subjects who demonstrated the greatest fatigue indexes (i.e., those who were most susceptible to fatigue) were generally the most resistant to a velocity-related torque loss. These findings support the possibility of using a multiple-velocity isokinetic test to estimate fiber type composition, just as fatigue-based tests have been used.

• 出版日期2015-8