If you have muscle imbalances and do not use corrective flexibility to fix them you may develop posture problems which not only make your body look out of proportion, but can cause injury.

http://AskTheTrainer.com/posture-problems.html

Find Stretches for your Lower Body to combat muscle imbalances.

http://AskTheTrainer.com/leg-stretches.html

Also find Upper Body Streatching Techniques:

http://AskTheTrainer.com/upper-body-stretches.html