文献类型：期刊文献

英文题名：Characteristics of quadriceps fatigue induced by continuous maximal knee extension among young and elderly adult men with different levels of physical activity

作者：Zhou, Sihong[1];Zhang, Xini[2];Yang, Feng[3];Zhou, Zhi[4];Zheng, Lixin[5];Fu, Weijie[2]

机构：[1]Shaoxing Univ, Yuanpei Coll, Shaoxing, Zhejiang, Peoples R China;[2]Shanghai Univ Sport, Key Lab Exercise & Hlth Sci, Minist Educ, Shanghai 200438, Peoples R China;[3]Georgia State Univ, Dept Kinesiol & Hlth, Atlanta, GA 30303 USA;[4]Fujian Univ Tradit Chinese Med, Chinese Med Integrated Western Med Coll, Fuzhou, Fujian, Peoples R China;[5]Shaoxing Univ, Teacher Educ Coll, Shaoxing 312000, Zhejiang, Peoples R China

年份：2021

卷号：29

期号：2

起止页码：193

外文期刊名：ISOKINETICS AND EXERCISE SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000639475800010)、、Scopus(收录号：2-s2.0-85104030880)、WOS

基金：The research work was supported by the Natural Science Foundation of Zhejiang province of China (LY14C110001), the Talent Development Fund of Shanghai Municipal (2018107) and the "Dawn" Program of Shanghai Education Commission (19SG47), China.

语种：英文

外文关键词：Elderly; quadriceps; fatigue; work

外文摘要：BACKGROUND: Skeletal muscle strength can be impacted by various factors. However, the possible effects of different forms of exercises on the elderly's muscle strength remain unknown. Furthermore, whether the level of physical activity influences the effects of an exercise-based training also remains unclear. OBJECTIVE: To investigate the characteristics of fatigued quadriceps by continuous maximum knee extension movements among different male groups under different physical conditions. METHODS: A total of 36 male participants (24 elderly and 12 youth) were divided into three groups, namely, young male group, and two groups of elderly participants: physically active and physically inactive. All groups underwent two sets of fatigue procedures. They initially finished 30 isokinetic maximum knee extension contractions at 60 degrees/s. Three days later, they completed 50 isokinetic maximum knee extension at 180 degrees/s. Then, their muscle strength characteristics were assessed. RESULTS: During the 60 degrees/s fatigue test the total work of the dominant and non-dominant quadriceps in the two elderly groups was significantly lower than that of the young male group (p < 0.05). Moreover, the total work of dominant quadriceps in physically active elderly male group was significantly higher than physically inactive male group in the middle (71.1 +/- 12.0 vs. 52.0 +/- 18.5 J) and the last third (60.9 +/- 8.6 vs. 44.4 +/- 15.4 J, p < 0.05). During the 180 degrees/s fatigue test the total work of dominant and non-dominant quadriceps in young male group was significantly higher than their elderly counterparts (p < 0.05). Moreover, the total work of dominant quadriceps in physically active elderly male group was significantly higher than in the physically inactive male group in the first (48.9 +/- 4.6 vs. 31.7 +/- 6.3 J), the middle (41.2 +/- 4.8 vs. 26.1 +/- 3.5 J), and the last third (33.3 +/- 7.0 vs. 20.3 +/- 3.1 J, p < 0.05). CONCLUSION: Exercise is associated with improved function and fatigue resistance of the quadriceps in elderly people. Moreover, the implications of the bilateral quadriceps' imbalance in this group may be of functional importance and should thus be clinically considered.