US Patent 10173093 Multifunctional muscle exerciser

Disclosed is a multifunctional muscle exerciser comprising two handles (1, 2). The two handles (1, 2) each comprise a connection end (1a, 2a) and a grip end (1b, 2b). A torsional spring (3) is connected between the connection ends (1a, 2a) of the two handles (1, 2). The torsional spring (3) is composed of stacked multichip spring steel pieces (31). The two ends of the multichip spring steel pieces (31) are respectively connected via fasteners. Preferably, both of the two handles (1, 2) are U-shaped. The connection ends (1a, 2a) of the two handles (1, 2) are coaxially arranged. The grip ends (1b, 2b) of the two handles (1, 2) are in parallel but are not on the same straight line.