What is the method of stretching the muscles behind the calf during roller skating warm-up?
Bend down, support your body with your arms and one leg (straighten, tiptoe on the ground), and bend the other leg in front of you to relax. Concentrate your body on the toes that support your feet, and press your heels backward and downward, feeling the muscles on the back of your calf tighten. Count to 10, relax, repeat 3 times, and then do it with the other leg for 3 times.