I have an old (10 yrs) rotator cuff injury that flares for 1-2 days following a workout. It was an anterior partial tear (partial delamination) that was resolved with therapy.  Is this just working through the scar tissue or should I be very cautious about building intensity and see how it goes? I haven't had to ice it or anything beyond the first workout. It just feels "stiff" at this point. It seems most aggravated by "Y" raises.

 Any advise, suggestions?

 Have a professional watch your form when you are performing overhead movement like the "Y" raise. It is pretty typical to compenstate for weak or injured muscles by using other muscle groups; likely the upper trapezii in this example. There are some great exercises you can do to strengthen the rotator cuff muscles in a stability role (check out Gray Cook and Brett Jones' "Secrets of the Shoulder" DVD, available at performbetter.com). I would recommend using one leg as a self spot while performing this exercise as the muscle appears weak (perhaps temporarily avoiding overhead exercises would be recommended). You probably want to spend some time with corrective exercise to make sure that the intended muscles are firing and the compensators are not.

 Good luck.

Thanks for the reply. I have removed the "Y" exercise from my routine. I did talk to a physical therapist about rotator cuff injuries and she did mention that they cause a lot of instability and weakness. Unfortunately, I can't see one without a Dr. script (and she can't treat me without it-she can only give vague advice).

It's weird because I can do all of the other exercises without grief.

I have been doing almost all of the exercises for the TRX with the exception of the "Y" raises, which were causing me pain. I had added kettlebell exercises half-way through (using the amazing weight of 7# then going up to 10# haha).  I can now report that going slow is the best bet and my shoulder is not bothering me.  I can now do the "Y" raises during the warmup for the TRX system. I do believe it's a case of "slow & steady" winning the race, taking it so much slower & lower in the weights really helped to build stability in the accessory muscles that assist the movement of the humerus (upper arm).