I do curls, bent-over rows, deadlifts, weighted salmon ladders, squats, juggling, bench presses, somersaults, and HIIT running in place. I also drink extremely expensive pharmaceutical-grade whey protein while I work out. I just can't help but feel that with this routine I'm neglecting my most important appendage.

Should I try lifting a light kettlebell with one finger at a time? I'm worried I'd injure myself or look silly, but the only other option I can think of is learning to solve a Rubik's Cube which would obviously look even more out of place in a gym setting.