1. rhyme _ dumbbell: Dumbbells can not only help you slim your arms, but also have obvious effects on the sculpture of back muscles and shoulder lines. It can even be used as a gravity aid for your lower body movement, making it more effective.

2. Elastic rope: There are large and small muscles in the human body. Heavy dumbbells can be used for big muscles, and elastic ropes can be used for small muscle groups that are difficult to practice (such as back arms). In addition, after weight training such as dumbbells, you can also stretch with elastic rope. The better brands of fitness equipment at home and abroad are: Shu Hua, Lanbao, Gao Qiao, Suer, Daiyu, Reebok and Li Jian.