what about extensor/ pushing exercises for the triceps, etc?
Seems that we pull and lift all the time, but don't push much. I heard that the triceps is about 2/3 of the normal muscle mass of the upper arm. When I saw my self in the window reflection, it seemed closer to the opposite proportion.
I used to rock climb a lot. I'd do, upon recommendation, push-ups to warm-up and to work the opposing muscle groups.
rowing is like climbing in a lot of ways, though some have said that they can do it as cross-training.
I think push-ups, bench presses with dumbbells, incline presses and military presses with dumbbells would be good, though I'm no physical therapist. At least start easy and feel it out.