| 摘要 |
A training device for acquiring the correct hand motion associated with the different types of sport and for strengthening the wrist and forearm. The device is simple and portable. It utilizes a combination of a magnet and a plunger, the magnet having a sufficient force to keep the plunger attached but not strong enough to prevent the plunger from dislodging from the magnet when a user snaps the device. The device is designed so that the snapping sound caused by the plunger hitting a wall synchronizes with the impact on the muscles felt by the user during a hand motion.
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