one leg donkey calf raise

Stand with your feet shoulder-width apart, toes pointing forward. Place your hands on a stable surface for support, such as a wall or a bar. Lift one leg off the ground, keeping your knee slightly bent. Raise your heel as high as possible, using your calf muscles. Pause for a moment at the top, then slowly lower your heel back down. Repeat for the desired number of repetitions, then switch legs.