Hello, stand with your feet in a splayed position, with your heels close together, your back straight, your abdomen and buttocks tightened (don’t lift your buttocks), step your feet 50 times, and stic

This depends on the condition of each person’s calves. If your calves are fatty, this action can help you tighten your calves. If your calves are muscular, this move won't be effective.

You must persist! As long as you persist, it will definitely work! Also, don’t overdo it~ Lajin should be done after practice~