US Patent 10159867 Exerciser

An exerciser is provided with a first operating arm and a second operating arm pivotally connects with an axis. Each of the first operating arm and the second operating arm includes a first end and a second end and the second end is used to be held by an operator. In addition, one or more non-metal elastic members are selected to couple with the first end or the second end of the first operating arm and the second operating arm, thus to provide resistance for the rotation of the first operating arm and the second operating arm.