10-Minute Workout for Defined Arms

b-ball-arms-
Credit: Nathaniel Welch

B-ball palm rotation

Stand with feet a little wider than hip-width, arms extended out to sides, palms down as if palming a basketball (A). Leading with pinkie, rotate arm forward from shoulder socket until palms and elbows are facing up. Reverse motion, this time leading with thumb (B). Do 30 to 40 reps.

Next: Back-hand press