physical activity和exercise的区别

Physical activity includes exercise as well as other activities which involve bodilymovement and are done as part of playing, working, active transportation, housechores and recreational activities.
身体活动包括锻炼以及涉及身体动作的其它活动，作为游戏、工作、出行（不用机动车）、家务和娱乐活动的一部分开展。
physical activity
英 [ˈfizikəl ækˈtiviti] 美 [ˈfɪzɪkəl ækˈtɪvɪti]
[医]体力活动
exercise英 [ˈeksəsaɪz] 美 [ˈeksərsaɪz]
n.练习;运动，训练;运用;典礼
vi.锻炼，训练，练习
vt.锻炼（身体某部位）;使焦虑，使忧虑;实行，发挥（作用）;运用
She exercises two or three times a week
她每周锻炼两三次。
They call rowing the perfect sport. It exercises every major muscle group.
他们称划船是最佳运动，它可以锻炼每一处主要肌肉群。
These stomach exercises will tighten abdominal muscles
这些腹部练习会增强腹肌。