Warn Up and Down Properly: Before any exercise or sport it is imperative to warm up properly. Regardless of the weather but especially in winter it is necessary to move blood into the muscles to prevent injury. Dynamic Stretching which involves simulating the range of motion of the exercise you are about to preform is an excellent way to attain this warm-up. It entails working with momentum and not holding at the end position. Static Stretching which involves elongating the muscles through extensions is most productive after finishing your work out. It stretches the muscles to the point of slight discomfort in an effort to relax the muscle after an exercise has been preformed.