1. Which is specifically concerned with preventing muscle inactivity.
    以防止肌肉活动停止。

2. In place of government inactivity, a number of local organizations have emerged.
    鉴于政府行动不力，许多地方组织便应运而生了。

3. Inactivity may also have negative effects on mind and body alike.
    不活动对大脑和身体都可能有负面影响。