Exercise device to train stomach, back and leg muscles; has at least two masses, which are physically coupled by connector elements to form oscillation system, whose movement is not easy to predict

摘要

The device has at least two moving masses (1-3), which are physically coupled by connector elements (4) to form an oscillation system. When the device is used, the system creates movements that are not easy to predict. At least one of the masses, preferably a ball (1-3), interacts with the user. Preferably, the connector elements are cords and there are three balls made of wood, rubber or plastics, which are spaced along the cord. The device may be suspended from the ceiling.