If you're doing hyperbaric oxygen therapy and not timing your sessions, you're leaving recovery on the table. At two atmospheres of pressure, a hard chamber can raise tissue oxygen by up to 1,200% — but that signal is only as good as the moment you send it. At HealthFit in Pasadena, Dr. Jason Han gives patients four timing rules: get in the chamber within four hours of hard training to catch the repair window, prep tissue in the two to three weeks before a planned surgery, go in the morning when you need your brain sharp for a big day, and schedule sessions around long flights to land ready instead of wrecked. Same chamber, same oxygen, completely different results — all because of timing. HBOT doesn't heal you on its own. It amplifies whatever your body is already trying to do. The goal is to line up the session with the moment your body is doing the most work.