shoulder pain....

Quick question for some of you that have lost a whole bunch already....

I am finding that I have a huge amount of shoulder pain...I believe it stems from my arms not being held in the same position as they have been for years and my muscles not having the proper strength to deal with he new positioning...

Have any of you dealt with this...My knees also have had to get used to the change in alignment from my thighs not pushing my legs out....