>I can do the rear delt exercise on the stability ball but I
>cannot do the bicep curls, kills my elbows, so I just follow
>Cedie and do the standing bicep curls.
They bother me as well.
I also don't do (with Cathe or any instructor): tuck jumps (unless it's on my rebounder), power scissors at the fastest speed. Any other move I think is risky for the knees.
For strength moves, I don't do: Slow and Heavy lunges (my knees tell me not to), barbell upright rows or any "high" upright rows, barbell overhead presses (I use dumbbells instead and turn my hands so they aren't straight forward: my shoulders like this better), a gazillion genie hops on one leg (I'll do 16 or so, or do power heel digs instead), the lunges in "legs and glutes" with the front foot on a dumbbell (knee trouble in the making, IMO). I also change a lot of the low squat pulses to a two-up/two-down squat move, or make sure I'm pushing "up" on the move so it doesn't go into my knee.
I also refuse to do all the leg presses in HSTA "as-is": too much of the same move with the same range of motion,etc. IMO. I change up each set: some on 12" with a weight, some 14" with no weight, some off to the side rather than back.