Lay on a bench and put your calves behind the leg holder (better if they are hold on around the lower calves). Hold a grip on the bars to make sure the body is firmly in place. Bend your legs bringing the weight up, go slowly back. During the exercise the body should not move, all work is done by the legs.

Диаграмма показывает самые используемые мышцы в этом упражнении