Just remember not to make that the only upper-body work you do.

In spite of the cautionary posts I put up here when I was doing the 100-pushups program, I didn't do an equal number of pull-ups, dips, internal/external rotations and reverse flyes, and wound up really screwing up my rotator cuffs and most of the muscles around them. Nerve impingement under the pec minor and everything. Nothing five or six intense neuromuscular massages plus all kinds of self-treatment with stretching, strengthening and a Thera-Cane couldn't cure, but I would've done better not to get myself there in the first place.