Sit upright. Hold left foot off the floor with left leg straight. Point toes up and downward. Repeat 3 - 5 times. Repeat with other side.
坐直。伸直左腿；将左脚离地。让脚趾朝上、下方向。重复3-5次。换另一边重复。
Sit upright. Hold left foot off the floor with left leg straight. Point toes up and downward. Repeat 3 - 5 times. Repeat with other side.
坐直。伸直左腿；将左脚离地。让脚趾朝上、下方向。重复3-5次。换另一边重复。
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