one leg floor calf raise

Stand with your feet hip-width apart and place your hands on a wall or sturdy object for balance. Lift one foot off the ground and balance on the other foot. Slowly raise your heel off the ground, lifting your body up onto the ball of your foot. Pause for a moment at the top, then slowly lower your heel back down to the starting position. Repeat for the desired number of repetitions, then switch legs and repeat.