Spatial manipulator apparatus for a mammalian subject includes a stabilizing base; a hemispheroidal truss frame mounted for rotation on the stabilizing base, the truss frame supporting and stabilizing an outer generally circular rim in relation to a non-concentric hub located at its rotational axis; and a second frame mounted orthogonally within the outer rim on a second rotational axis, the second frame being configured to support a mammalian subject during spatial manipulation thereof by rotation about one or more of the orthogonal rotational axes. Preferably, the truss frame and the second frame are driven for rotation about the orthogonal rotational axes to achieve a desired mammalian-subject spatial orientation within a chair-like structure pivotally adjustably mounted within the second frame. Preferably, the truss frame includes a substantially circular rim member mounting the second frame for rotation therein; three or more struts connecting from circumferential substantially evenly spaced locations along the circular rim member to a point of convergence on the truss frame through which the first axis extends; and a hub at the point of convergence mounting the three or more struts.

A rotary-type exercise device in which the user jogs, runs, or walks within a cylindrical treadwheel. A safety harness attached to a horizontal stationary beam within the treadwheel above the user prevents the user from falling. A remote control baton controls a braking system for braking and selectively varying the rolling resistance of the treadwheel. Another embodiment provides a harness tied to the hull of a space station to simulate gravity when the exercise device is used in an outer-space, gravity-free environment. Additional embodiments include safety rails. Another embodiment forms the treadwheel in two mating semi-cylindrical sections for facilitating transportation and shipping of the treadwheel. An electronic console continuously apprises the user of his horizontal velocity, time, distance and load factor.

An aspect of the invention involves a method of using a collapsible exercise device including providing a collapsible exercise device; positioning a first end of an adjustable incline at a desired height with respect to a vertical support member so that the adjustable incline is at a desired inclination; moving first and second combination pulley-support and pull-up bars to a desired position; moving first and second pulleys connected to the first and second combination pulley-support and pull-up bars to a desired location; and moving a support platform along the adjustable incline through cable movement through the first and second pulleys on the combination pulley-support and pull-up bars.

An exercise device includes a vertical support member; an adjustable incline having a first end and a second end, the first end of the adjustable incline adjustably supported by, and vertically movable with respect to, the vertical support member for adjusting the incline of the adjustable incline; a user support platform movably attached to the adjustable incline; first and second pulleys coupled to the adjustable incline; one or more cables extendable through first and second pulleys and coupled to the user support platform for movement of the support platform along the adjustable incline through cable movement; and a non-motorized lift assist mechanism coupled to the adjustable incline and configured to impart a force on the adjustable incline to assist a user in adjusting the incline of the adjustable incline.