Place safety bar on rack approximately lower leg height with calf block slightly rear of safety bar. Sit on bench facing safety bar and place toes on lower portion of platform with heels extending off. Scoot forward to edge of bench and position lower thighs under safety bar. Grasp bar to sides and lift bar from rack by pushing heels up. Slide back to center of bench.
Lower heels by bending ankles until calves are stretched. Raise heels by extending ankles as high as possible. Repeat.
Slide forward to edge of bench and rack safety bar when finished. See suggested mount & dismount. Movement is predominately Soleus. Gastrocnemius are in active insufficiency since knees are significantly bent. See Calf Exercise Analyses.