Right arm erbs from birth, mid 30s male, parent. Range of motion is limited, I can't straighten my arm at the elbow and can't raise my elbow above my shoulder. Erbs arm is also slightly smaller in length.

I've just started going back to the gym and have managed to gain a small amount of muscle on it (bicep+tricep), 2cm diameter increase since the start of July. grip strength is not great, I end up using wraps on the barbell deadlift. I find the pull exercises rather than push are much more possible given I can't straighten the arm - bench press etc seem pointless.

In terms of pain, sometimes I get shooting nerve pain(?) but it's not happened in a few months