This exercise improves strength of the hip and leg while also challenging balance and stability.
Begin standing with your feet hip width apart. Hold a weight in your left hand. Shift your bodyweight until you are balancing on your right leg with your knee slightly bent.
Hinging at the hips, slowly lean forward reaching your left leg straight back behind you while the left hand reaches towards the floor. Then slowly return to the starting position.
Keep your back straight and your core engaged. Your arm with the weight should be relaxed and hang toward the ground as you reach your left leg behind you.
Repeat on the other side.