Here it is: the fix for shoulder blade/scapular weakness on one side that makes progressing your P90X workout, or any upper body workout for that matter, harder.
If you follow the above links you will see how to strengthening one-sided shoulder girdle problems. When the shoulder girdle is weak, it can cause winging. If it is just a little weak, like it is with this lady, then you may have headaches, because of the stretch to the upper trapezius. You might also develop rotator cuff impingement due to this problem.
How do you develop shoulder blade weakness? Usually it hppens because you might have an arm injury, which can make your muscle weak as they try to protect you and stop you from using an injured body part. Other causes can be prolonged computer use in which your arms and shoulder are held in the shoulder forward position.
Is your arm or pushup P90X workout difficult? Did you order your P90X to come to Olympia, Lacey or Tumwater, only to find out you are having problems? Are you struggling but not sure why? Do you have shoulder blade or middle back pain? You might have weak shoulder blade muscles that make your shoulder wobbly on your ribs. Here is what this looks like (the left side is the weak side) when you lift your arms up overhead :
Here is what it looks like when you try to do a push up:
Tune in the next few days to see a couple of exercises to fix this!