Patent ID: 7578774

Claim:
A machine to assist a person in strength training, the strength training machine comprising: a left upright having a left upright interior and a left upright slot; a right upright having a right upright interior and a right upright slot, where the right upright is positioned remotely from the left upright so that the right upright slot faces the left upright slot; a left rod positioned in the left upright interior; a right rod positioned in the right upright interior; a bar positioned between the left upright and the right upright and attached to the left rod through the left upright slot at a bar left end and attached to the right rod through the right upright slot at a bar right end, where the bar is configured to be grabbed substantially from underneath the bar by the hands of a person positioned both below the bar and between the left upright and the right upright; a left cylinder positioned in the left upright interior and configured to be in hydraulic communication with the left rod such that the left rod raises and lowers in response to hydraulic communication signals from the left cylinder; a right cylinder positioned in the right upright interior and configured to be in hydraulic communication with the right rod such that the right rod raises and lowers in response to hydraulic communication signals from the right cylinder; and a hydraulic motor connected both to the left cylinder and the right cylinder, where the hydraulic motor is configured to generate hydraulic communication signals to move the left rod and the right rod together at a constant rate so that the bar raises and lowers at a constant rate, where the hydraulic motor, the left cylinder, the left rod, the right cylinder, and the right rod are configured to prevent the bar from moving in response to the person one of pressing and pulling against the bar, no matter how hard the person presses or pulls on the bar such that the strength training is achieved by pitting the muscles of the person against the moving bar that is immovable by the muscles of the person.