We do however ask you to understand that it may not be possible to answer every question, but we will make the attempt. You may also ask your questions on the Sports Medicine Discussion Board , where other members of the community may be able to provide with with answers or at least some guidance. I am a tennis player. I get a stiff back after my game and also I lose my balance in certain positions. Back stiffness after activity can be related to a number of conditions and certainly among them is poor flexibility.
Flexibility is something that all people can attain with a consistent program of stretching.
Of particular importance for someone who experiences back stiffness are the hamstrings, back muscles themselves and the hip flexors. I would suggest a daily 15-30 minute program of good general stretches following a brief warm up period. Muscles stretch best once the core temperature and good blood flow has been established a bit by aerobic type exercise. The tightness of your muscles and joints can also be the cause of your loss of balance control. As your muscle reach their maximal sustainable length, it is quite possible that you are unable to maintain this posture without loss of balance.