Exercise apparatus with dynamic in-repetition motor induced resistance

An exercise resistance apparatus, comprising:

• a rotatable drive element;
• a motor control circuit;
• a DC motor operatively connected to the motor control circuit, the DC motor operatively connected to drive the rotatable drive element, the DC motor being controlled at least in part by the motor control circuit;
• a physical resistance delivery section operatively connectable to the rotatable drive element;
• a position sensing circuit for sensing a position of a least a portion of the resistance delivery section during a given repetition;
• and
• wherein the motor control circuit generates a plurality of different currents used to drive the DC motor during a positive stroke of the given repetition;
• and
• wherein the motor control circuit is configured to control an amount of exercise resistance electrically induced by the DC motor during the positive stroke of the given repetition in response to the sensed position such that during the positive stroke of the given repetition the exercise resistance is varied based on at least using a plurality of different ones of the different currents to drive the DC motor during the positive stroke of the given repetition.

An exercise resistance apparatus, comprising:

• a rotatable drive element;
• a motor control circuit;
• a DC motor operatively connected to the motor control circuit, the DC motor operatively connected to drive the rotatable drive element, the DC motor being controlled at least in part by the motor control circuit;
• a physical resistance delivery section operatively connectable to the rotatable drive element;
• a position sensing circuit for sensing a position of a least a portion of the resistance delivery section during a given repetition;
• and
• wherein the motor control circuit generates a plurality of different currents used to drive the DC motor during a negative stroke of the given repetition;
• and
• wherein the motor control circuit is configured to control an amount of exercise resistance electrically induced by the DC motor during the negative stroke of the given repetition in response to the sensed position such that during the negative stroke of the given repetition the exercise resistance is varied based on at least using a plurality of different ones of the different currents to drive the DC motor during the negative stroke of the given repetition.