Calves - lower legs. Why do I have to do work my calves? You have to work your entire body.
Calf muscles are key muscles that need to be high in motor activity from time to time. Here is a video showing Kathy working out on a beginner level on the calves doing a One Leg Calf Raise exercise guided by fitness expert Raphael.
Beginner Exercises - Working With Calf Muscles Video