Stretching is important because it improves muscle balance around a joint, thus improving posture. It reduces the chance of injury when playing a sport or in everyday activities and it increases the blood flow and nutrient supply to muscles and cartilage, thereby reducing muscle soreness.The University of Alberta’s Faculty of Physical Education and Recreation has programs in Biomechanics and related disciplines that can help you better understand the relationships between physical activities and overall health. Click here for more information.