The idea of Hyperbaric living is about getting the full benefits from this environment. It will start with small but comfortable chamber or pods, then to a house built just for the purpose with a greenhouse added to that. then to add and add housing to build a community, and lastly to enclose said community in a cylindrical dome to live perfectly comfortable.
The long term effects for the most part are unknown which is part of the adventure. But you can expect to rapidly lose unnecessary weight, regain youthful skin, improved hearing and eye sight, easily build muscle and bone, etc. There is a lot of unanswered question that i intend to discover.
Normal Oxygen levels in our atmosphere is at ~21% which would be raised to 35 - 40%
More oxygen alone will give you more energy
A certain level of Oxygen is need for you body to discard toxins, for production of cells and proper function.
The natural level isn't enough so we essentially are constantly at a state of asphyxiation
2) Higher Atmospheric Pressure
Normal pressure in the atmosphere is at ~14psi or 1atm which would be raised to 2.5 - 3atm
Above 2atm, the plasma in the blood becomes saturated thus being able to have a surplus of a oxygen reserve
With higher pressure you can think of it like a supercharger on a car in which it pushes air into the system. You can run faster, longer and same goes for your brain
In oxygen rich environments, bad bacteria struggle living. But in higher atmospheres above 2atm they can't live whatsoever
3) Long-term Exposure
As where some use this as therapy known as Hyperbaric Oxygen Therapy (HBOT), I'd be using it as day-to-day living
This way of living or even treatment, which is expensive, rare, and hardly covered by insurance or is even looked over by most doctors, will start to fix your whole system
Living in this environment, your body "normalizes" to a state where virtually don't age, get sick, fully of energy, fully focused
Your body heals from wounds a lot faster with far less scaring if any
Diseases and cancers tends to fall apart and disappear. Also preventing any of them and might even weed out future deformities in the long run
Parts that would other wise not heal or need stem cell simulation, start to heal like nerves and brain cells
Mr. Oxygen explains the use of oxygen in your system and how in a normal environment you can compensate for the lack of key nutrients that used oxygen in your body. This is a great example of how a great diet will improve your body in a standard environment, and even more so in a pressured system with food grown in that atmosphere.