Proper stretching helps you strengthen your muscles and increase your flexibility. And post-workout stretching can help reduce the buildup of lactic acid, which can lead to muscle cramps and stiffness.            Hold each of the following stretches for 10 to 30 seconds and stretch evenly on both sides. There will be a mild discomfort with a good stretch, but it should never feel painful. Be sure … Continue reading Walking 101: cool-down stretches