Body forward flexion is just a stretch to stretch the back of the thighs and waist muscles, but also as a measure of body flexibility, there is no help to alleviate the calf muscle development, you can stretch the calf muscles and reduce bouncing and running and other aspects of the exercise pull relief.
This effect is usually effective when the exercise is just over, because the muscles contract frequently during the exercise, and after the end of the end is also in a large amount of congestion and a very tense state, then at this time the massage can help to relax the calf muscles, in fact, the muscles are just re-relaxed, and did not disappear because of the massage.