Abstract: A system and method for capturing, measuring and analyzing motion in real-time is provided which operates with or without markers. A threshold image is based on a background image and is created to minimize noise during the motion capture. A captured image is compared to the threshold image to identify collections of hot pixels or globs. The globs are compared to expected characteristics of the markers or the subject and are tracked between frames. Glob information is used to determine the location of the markers or subject in each frame.

Abstract: A system and method for capturing, measuring and analyzing motion in real-time is provided which operates with or without markers. A threshold image is based on a background image and is created to minimize noise during the motion capture. A captured image is compared to the threshold image to identify collections of hot pixels or globs. The globs are compared to expected characteristics of the markers or the subject and are tracked between frames. Glob information is used to determine the location of the markers or subject in each frame.

Abstract: An exercise apparatus permitting external torque applied in resistance to an exercise to be adjustably controlled during the course of the exercise to match the external torque applied with the internal torque produced by the muscles involved in the exercise. The exercise apparatus is disclosed embodied in a sit-up apparatus in which weights can be adjustably mounted on weight arms extending in line with the subject's torso and behind the subject's torso for normal subjects, and below the torso to assist weak subjects for rehabilitative purposes.