Application of the neuromuscular fatigue threshold treadmill test to muscles of the quadriceps and hamstrings  

作　　者：Clayton L.Camic Attila J.Kovacs Trisha A.VanDusseldorp Ethan C.Hill Evan A.Enquist 

机构地区：[1]Human Performance Laboratory,Exercise and Sport Science,University of Wisconsin-La Crosse,La Crosse,Wisconsin 54601,USA [2]Department of Exercise Science and Sport Management,Kennesaw State University,Kennesaw,Georgia 30144,USA [3]Department of Nutrition and Health Sciences,University of Nebraska-Lincoln,Lincoln,Nebraska 68583,USA [4]Department of Kinesiology,University of Alabama,Tuscaloosa,Alabama 35487,USA

出　　处：《Journal of Sport and Health Science》2020年第6期628-633,共6页运动与健康科学（英文）

基　　金：funded by a Faculty Research Grant through the University of Wisconsin-La Crosse,La Crosse,Wisconsin,USA.

摘　　要：Purpose:The purposes of the present study were:(1)to determine whether the physical working capacity at the fatigue threshold(PWCFT)model that has been used for estimating the onset of neuromuscular fatigue in the vastus lateralis(VL)during incremental treadmill running could also be applied to the vastus medialis(VM),biceps femoris(BF),and semitendinosus(ST)muscles;and(2)if applicable,to compare the running velocities associated with the PWCFT among these muscles.Methods:Eleven subjects(age 21.7±1.8 years)performed an incremental treadmill test to exhaustion with electromyographic signals recorded from the VL,VM,BF,and ST.Results:The results indicated there were no significant(p>0.05)mean differences in the running velocities associated with the PWCFT for the VL(14.4±2.0 km/h),VM(14.3±1.9 km/h),BF(13.8±1.8 km/h),and ST(14.7±2.3 km/h).In addition,there were significant inter-correlations(r=0.68-0.88)among running velocities associated with the PWCFT of each muscle.Individual results also indicated that 9 of the 11 subjects exhibited identical PWCFT values for at least 3 of the 4 muscles,but there were no uniform patterns for any intra-individual differences.Conclusion:The findings of the present study suggested that the PWCFT test is a viable method to identify neuromuscular fatigue in the quadriceps and hamstrings during incremental treadmill exercise and results in consistent PWCFT values among these muscles.

关 键 词：EMG amplitude Muscle activation PWCFT 

分 类 号：G804.7[文化科学—运动人体科学]