Stretching is important as you need enough flexibility to have a large range of movement as well as to remain pain free. Include dynamic stretching in your warm-ups while saving static stretching for after your workouts, training or game. Attempt to self-identify tight areas and work on them. Stretching is a good way to release tightness before and after training and is an important part of recovering correctly. A cool down should involve 15 minutes of stretching at the end of every training session.