卷力练习器●任兴利现在市场上出售的各种健身器械，大部分是对大肌肉群进行训练的。例如：杠铃、哑铃、拉力器和各种重块式训练器械。体育比赛中，不但要求运动员的大肌肉群发达，而且也要求小肌肉群发达。有些项目特别要求前臂肌群和手肌肌群发达，却没有合适的专门器械... Rolling force trainer ● Ren Xingli Now on the market for the sale of a variety of fitness equipment, most of the training for large muscle groups. For example: barbell, dumbbells, Rally and a variety of weight training equipment. Sports competition, not only requires athletes developed large muscle groups, but also requires the development of small muscle groups. In some cases, the muscles of the forearm muscles and hand muscles are particularly developed, but there is no suitable specialized instrument.