国际上将体力活动定义为:由骨骼肌收缩产生的身体活动,其可以在基础代谢的水平上,增加能量消耗。一般是将体力活动分为职业的、家庭的、休闲的和交通的体力活动。其中,休闲时间的体力活动可以进一步再分类,如比赛的体育项目、娱乐活动(如徒步旅行、骑脚踏车)和体育锻炼(exercise training)等。 Internationally, physical activity is defined as physical activity resulting from the contraction of skeletal muscles, which can increase energy expenditure at the level of basal metabolism. Physical activity is generally divided into professional, family, leisure and transportation of physical activity. Among them, leisure time physical activity can be further reclassified, such as sports competitions, recreational activities (such as hiking, cycling) and exercise training (exercise training).