A simple exercise to improve flexibility is the standing quadriceps stretch. To perform it, stand on one leg, bend the opposite knee, and grab the ankle with the hand, gently pulling it towards the glute. Keep the knees together and hold for 15 to 30 seconds on each leg. This stretch enhances flexibility in the quadriceps and helps maintain balance and stability. Regular practice can contribute to improved mobility, reduced risk of injuries, and better performance in various physical activities.