Abstract: Described herein are fields of exercise or therapy systems in particular exercise or therapy systems that controllably generate and maintain an unweighted environment using a mechanical system or a differential air pressure (DAP) envelope about a user so as to at least partially or completely unweight the user. This application also relates to improved control systems for pressure chambers for use in differential air pressure (DAP) systems including data collection and utilization for general fitness use, athletic use, or medical use treadmills and related software, control and analytics systems, especially as related to obtaining gait data from load cells provided in the system.

Abstract: A method and apparatus for generating a structured profile of activities and transitions is provided. The method includes receiving data related to a plurality of activities and a plurality of transitions, wherein each of the plurality of transitions is a path between a pair of activities among the plurality of activities, storing the data related to the plurality of activities and the plurality of transitions into the storage device, reducing a dimension of the data by indexing the data using state variables, generating a plurality of nodes, wherein each of the plurality of nodes corresponds to each of the plurality of activities, generating a plurality of links, wherein each of the plurality of links corresponds to each of the plurality of transitions, and storing the plurality of nodes and the plurality of links as the structured profile at the storage device.