Hyperbaric exercise facility, hyperbaric dome, catastrophe or civil defense shelter

A method of using a hyperbaric facility to exercise comprising the steps of:

• a) providing a first hyperbaric dome, the first dome including a first exterior domed reinforced concrete wall and a reinforced concrete floor surrounding an interior, and a pressure regulating system which controls the pressure of the interior of the first dome;
• b) providing at least one double air lock for entering the interior of the first dome;
• c) providing a second hyperbaric dome including a second exterior domed reinforced concrete wall, the second dome being connected to the first dome of step “a” by the at least one double air lock;
• d) a plurality of people entering the first dome and exercising within the first dome;
• and
• e) the pressure regulating system increasing the pressure of the interior of the first dome to at least 1.2 atmospheres;
• wherein neither the first or second dome is located with the respective other first or second dome.