It is really important to find the balance in your fitness routines. After all your training sessions and after a hard workout you have to make the time to stretch. Training involves contracting your muscles repeatedly over time. So in order to maintain that balance you need to stretch which elongates your muscles. Without stretching, your muscles can tighten up and over time this can lead to muscle pain, joint pain and musclular and strength imbalances. So after your sessions, make the time for a stretch. Even a quick stretch for 5 mins will make a world of difference to how your body feels after the workout once you have cooled down.