Somewhere I believe there is a workout routine specifically developed for young bucks preparing for RASP. Look at this, but look especially close at the warm up and cool downs. If you have concerns about pain, your first and foremost rule of thumb is to ask a doctor, not an on-line forum. You may get lucky and have a high speed medic happen to notice your question, but otherwise you'll just get people like me. Judging from your PT results, my $3.00 medical opinion is that your workouts have been neglecting the body below the armpits and your legs just aren't up to the challenge yet. Work on your flexibility,and incorporate warm up and cool down exercises into your workout. If you believe that what you are experiencing is something other than weakness leaving your body, you should ask a doctor. It would be stupid to be breaking yourself down by trying to hard core it through an injury. There's a time and place for that, but this ain't it; not yet. (And a bonus opinion included with your low, low price)
Aco 3/75 1988-1990
HHC 2/11 1990-1992
Aco 2/3 SFG(A), ODA 345,346 1993-1996
HSC 2/3 SFG(A) CE 1996-1997
My pain is self-chosen
"Of the seven deadly sins, Mr. Grumpy represents Wrath".