Spin it. It pushes back. Harder as it goes faster.
The gyroscopic resistance in a power ball engages forearm flexors, extensors, and rotators in a way that almost nothing else does. It builds grip strength, wrist stability, and forearm endurance without adding load to your joints — which makes it useful for rehab, maintenance, and performance in equal measure.
Auto-start means no cord setup. Just the ball and your wrist. Use it during breaks, while you're on a call, or as a finisher after any upper body session.
Climbers, grapplers, lifters, and anyone who types for a living — your forearms are undertrained. This is the fix.