STW-The training weight accelerator
For Penholder only
The weight 320 +/- 5g, suits the contestant to wield pats the gravity training physical strength, the strength of arm and wields pats experience of the centrifugal force, is the strengthened training applies the tool specially.
when weight training, grips the racket the weight accelerator package, uses itself to be familiar with the racket to wield the racket to be handier.
Attention! Before the use, must carry on full warming up, avoids the skill, the elbow, the waist movement of injury and so on, the initial period training quantity should proceed in an orderly way, cannot act with undue haste.