Methods and apparatus for body weight support system

A system for providing body weight support, the system comprising:

• a trolley movably suspended from a support track, the trolley including a winch assembly and a motor;
• a tether having a first end portion coupled to a portion of the trolley, a second end portion of the tether configured to be coupled to an attachment device worn by a user to couple the user to the trolley;
• and
• an electronics assembly at least partially disposed in the trolley, the electronics assembly including at least a memory and a processor in communication with the memory, the processor configured to define (1) a reference length of the tether when the attachment device is in an initial position, (2) a first criterion associated with a change in a length of the tether, (3) a second criterion associated with a duration of a change in a length of the tether, and (4) an amount of the body weight support to provide in response to the user falling when the user is coupled to the trolley,
• the trolley configured to drive the motor to provide the amount of body weight support in response to the processor determining a fall has occurred based on the first criterion and the second criterion being satisfied.