Lunges help to improve balance and increase strength in one of our most essential and basic movements that we do every day: walk. This exaggerated walking motion is a great one to master and is easily modified into something more challenging by adding weights to the movement. Stand with your feet shoulder-width apart. Take a big step forward, making sure the knee stays above the ankle and at a 90-degree angle to the ground. If space allows, move forward, alternating legs. If not, push back against the bent leg to return to a standing position.