Everlast Hand & Finger Strengthener
So I never thought I'd be interested in doing hand work-outs. I mean it sounded bizarre to me at first. But strengthening your fingers really does help long term with balance conditioning. Each finger has its own workout included in the instructional book. And it'll strength your wrist and forearm as well. It even comes in a little case that you can toss in your bag and bring with you everywhere.