Namely the sports of the thigh , shank , foot and the crooking stretching sports of knee and ankle joint .
即大腿、小腿和脚部的运动以及膝关节和踝关节的屈伸运动。
The doctor told her to spend a few minutes crooking and uncrooking her fingers , several times a day , in order to keep the arthritic joints as supple as possible .
