I agree with the advice the other CA TOSers gave - he needs to make the appt with Dr Jordan and see him, then Dr Jordan will guide him as far as PT and other treatment. There are very few PT's who understand TOS, and doing the WRONG kind of PT can make him much worse, much like swimming did. No strength training, no weights, or therabands, or handbikes, etc. I wd advise maybe massage, gentle stretches (esp. trying to loosen the pec area - but GENTLE), ultrasound or hot towels on those tight muscle area, but otherwise, the nerves are irritated and further exercise is likely to increase, not lessen the problem.

Relaxing in a heated pool or hot tub (limit time in hot tub) may bring pain down.

But he needs to get in and see Dr Jordan - let him know he's REALLY lucky to have a top Dr that close. I flew from IL to PA for a consult and dx!!!

Best wishes, and be sure and let us know how the appt turns out!
beth