What are imbalances? Is anyone really balanced? The question is when to chronic adaptations become dysfunctional. That's another tough question because what you see during static or even controlled dynamic situations does not necessarily occur at typical sport or daily activity speeds.
Even when you "correct" the imbalance, there's no guarantee that performance will improve. You have to look at limiting factors.
Even the best athletes in the world function with asymmetries and perceived "imbalances".
That being said...Flexibility differences will create compensatory movements. For lower extremity flexibility assessments, squatting and deadlifting are really good tools to identify potential issues.
Prolonged acute hip flexion activities such as desk work, school, cycling, etc. can cause the dropping of sarcomeres from the muscles effectively shortening them. If it only occurs on one side, you'll have compensatory adjustments in posture radiating outward from your center throughout your kinetic chain. One leg will appear longer than the other and you may demonstrate an adaptive scoliosis. This will cause compensations at the shoulder girdle, head posture, etc. as well.
Overtime, your shorter muscles may have trouble producing force. This may explain your lifting assymetries and the scapular winging.
You need a postural/orthopedic assessment to determine your needs BUT
Here's a guess...
Look for proximal issues first.
Start with stretching you hip flexors on the side of your body that you typically have up for extended periods of time. Use a combination of active and passive methods to accelerate progress. Dynamic lunges, isometric lunges (one of my favorites), and all variations of static stretches.
On the winging scapula side, subscapularis may be tight and weak as well as serratus anterior. If your shoulder girdle protracts, pec minor may also be an issue for being tight and weak.
Address these issues for about 2 months intensively and see what changes.
If you can, get an assessment from someone who can identify postural issues and do functional muscle testing.
Oh, and try to retrain your habits to be more symmetrical...alternate up legs and correct your shoulder girdle posture every time you look at a clock.
Keep us posted.
Bill Hartman, Level 203 H.A.R.T.M.A.N. certified
P.S. Depending on development of scar tissue, adhesions, etc. you may need some soft-tissue work to correct and problems.
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