Evaluation of fatigue of respiratory and lower limb muscles during prolonged aerobic exercise |
| |
Authors: | Nadiv Yaara Vachbroit Ricki Gefen Amit Elad David Zaretsky Uri Moran Dani Halpern Pinchas Ratnovsky Anat |
| |
Institution: | Department of Biomedical Engineering, Faculty of Engineering, Tel Aviv University, Israel. |
| |
Abstract: | The respiratory muscles may fatigue during prolonged exercises and thereby become a factor that limits extreme physical activity. The aim of the current study was to determine whether respiratory muscle fatigue imposes a limitation on extreme physical activity of well-trained young men. Electromyography (EMG) signals of respiratory (external intercostal and sternomastoid) and calf muscles (gastrocnemius) were measured (N = 8) during 1 hr of treadmill marching at a speed of 8 km/hr with and without a 15 kg backpack. The root mean square (RMS) and the mean power frequency of the EMG signals were evaluated for calculating fatigue indices. The EMG RMS revealed that the respiratory and calf muscles did not fatigue during the marching without a backpack load. The study did show, however, a significant rise in the EMG values when a backpack was carried with respect to the no-load condition (p < .05), which suggests that respiratory muscles should be trained in military recruits who are required to carry loaded backpacks while marching. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|