Diet Health shows viewers great exercises that will work well for the legs, thigh and specifically the inner thigh. These will require that you use an exercise ball. First, you will want to lay flat on the floor. Your back should be flat as well as your arms laying flat to your sides. Lift your legs so they are bent at the knee with the exercise ball being held in between your feet. You will want to squeeze your inner thighs to keep the ball in place. Keep your knees in the same place as you lift and drop your legs with the ball. This strength will come from your core and will work your thighs, legs and inner thighs.