Plyometric pull-ups. Building up to clapping pull-ups. Warmed up with a minute of monkey bar fun, swinging back and forth and just roving back and forth like a hanging monkey. Then did several sets of tossing my body into the air and getting my hands off the bar before grabbing back on. I don't know how I'm going to move my arms while I'm airborne, they are stiff as iron! I can barely do a sidecrawl because of how my muscles lock up and turn to stone while working out. It's AMAZING for body building, but not terribly useful for functional, fast arm work. I stretch and move through full range of motion between sets and after workouts, but even though my general mobility is great, I just can't move my arms quickly once I've been exerting strong force. Any ideas?