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Dumbbell occupies several advantages as simple fitness equipment, such as small size and flexible usage. But it is also involved in some problems, for instance, the fixed weight, simple function and boring exercises. The Power Stretch is a comprehensive strength training equipment shaped in dumbbell, which combines the functions of dumbbell, rope skipping and chest developer. The inner elastic rubber rope could be used to modify the weight of the dumbbell by stretching strength. It is light compared with the ordinary one, bonding with the function of strength training and rope jumping. It is suitable for the office and houses.
Dalian Minzu University
Dalian, China
Haimo Bao , Bo Li , Wenqiang Zhou , Huanle Li