Static stretching: exercise the posterior calf muscles
Picture 1 Action essentials: the rear heel does not leave the ground, the knee joint of the front leg does not exceed the toes, and the upper body keeps the chest and abdomen lifted;
The essentials of the action in Figure 2 are to straighten the knee joint of the front leg, keep the heel from the ground, and position the hip joint of the front leg as far forward as possible.
