Physical activity and neuromuscular variables at first measurement.

Values are mean(SD). The first test of physical activity, countermovement jump and single-leg hopping were conducted before isolation. Grip force was first measured on the 21st day of isolation. g = 9.81 m/s2. Activity temperature is a measure of the average absolute acceleration over the course of the day: more changes in body position (e.g. sit-stand) and more changes in walking speed means higher overall average acceleration.

数据以均值（标准差，SD）表示。首次身体活动测试、反向运动跳（countermovement jump）测试以及单腿跳（single-leg hopping）测试均于隔离前开展。握力的首次测量于隔离期第21天进行。重力加速度g=9.81 m/s²。活动温度（activity temperature）为单日平均绝对加速度的量化指标：身体姿态变化（如坐-站转换）越多、行走速度变化越频繁，则整体平均加速度越高。