Abstract: A portable hypobaric sleeping chamber for acclimatization to high altitude or athletic conditioning is provided, capable of maintaining internal pressures about 0.1 to about 10 psi below ambient.

Abstract: A portable hyperbaric chamber is provided that allows a person to perform endurance exercise at barometric pressures of from 0 to 10 lbs./square inch greater than ambient. The chamber is portable, semi-spherical and inexpensively constructed of an essentially air-impermeable, flexible material. The chamber is used for endurance conditioning, to improve the athletic performance of people who live at altitudes above sea level.

Abstract: The invention relates to a sole system for use especially with an athletic shoe or prosthesis. The sole includes a coupled spring configuration that forms a collapsible, longitudinal arch to permit maximum storage and release of energy during the running cycle.

Abstract: An underwater breathing apparatus is provided for delivering air to a submerged diver. A manual pump supplies air under pressure to a reservoir bag for delivery to a diver through an air hose. Alternatively, the reservoir bag can be further connected by an air hose to a floatable variable-pressure reservoir bag that delivers air through an air hose to a submerged diver. In order to constantly maintain the air pressure in the reservoir bag in a preselected range, a pressure gauge is provided for the pump operator, who then pumps selectively to maintain the proper air pressure. The diver wears a breathing means having a flow restrictor/shut-off valve, a one-way inlet valve, and a one-way exhaust valve for exhalation. Additionally, an electric pump may be used either to replace the manual pump or as a back-up thereto.

Abstract: A portable hyperbaric chamber is provided that allows a person to perform endurance exercise at barometric pressures of from 0 to 10 lbs./square inch greater than ambient. The chamber is portable, semi-spherical and inexpensively constructed of an essentially air-impermeable, flexible material. The chamber is used for endurance conditioning, to improve the athletic performance of people who live at altitudes above seal level. Another embodiment of this invention is the hyperbaric mountain bubble. This embodiment, designed for use at high altitudes to prevent mountain sickness, provides a portable sealed chamber in which a patient may be placed. The pressure inside the chamber is raised, providing an interior environment equivalent to a descent from altitude to as low as sea level, to alleviate the symptoms of mountain sickness. In a further embodiment, the mountain bubble is expanded to provide a high altitude habitat suitable for use as a mountain tent, which may be pressurized or not as desired.

Abstract: A portable hyperbaric chamber that allows a person to perform endurance exercise at barometric pressures of from 0 to 10 lbs/square inch greater than ambient. The chamber is portable, semi-spherical and inexpensively constructed of an essentially air-impermeable, flexible material. The chamber is used for endurance conditioning, to improve the athletic performance of people who live at altitudes above sea level.