Stretching is not just about trying to do the splits, it's about restoring the bodies ability to move. As we go about our daily life's we are constantly moving against gravity and as creatures of habit we tend to do the same things every day. Whether that means sitting at a desk all day, exercising with weights or running every day or standing on your feet all day. As a result of this repetitive motion or lack there of, the body will slowly adapts to what your doing. Some areas will get tighter from the overuse while others may get weaker.