Abstract:To discuss the muscle fatigue of men and women in backpacking task under different conditions. An experimental paradigm for male and female on backpac walking task, fMVC and f’MVC of the back muscles, Rh, Tme and Borg Erp were measured before and after the task. Twelve adult participants (6 males and 6 females) were requested to carry a bag with 0%, 12.5%, and 25% of their body weights dumbbells on their backs. Then walked on the treadmill until they could no longer walk at three different speeds (2, 4, and 6 km/h) and two different inclinations (0 and 10°). It was found that back strengths decreased after the carrying tasks, the Erp results were gradually increased after the backpacking task; The fMVC of Males were decreased quickly, and Males were more resistant to muscular fatigue than Males, while Females were easier to perceive fatigue. It is expected to provide targeted suggestions on the job design and life arrangement for the practitioners, so as to prevent the risk of musculoskeletal diseases (MSDs)