Exercise creates free radicals. from Mercola: Antioxidants are substances that help protect the body against cell damage from free radicals. The body produces free radicals as a part of normal metabolism, after exposure to some environmental pollutants and exercise.3 At high levels they can damage cells and genetic material.Saturated oxygen under pressure is a powerful tool so knowing how this tool can cause harm is important. I have not noticed anyone being harmed by this therapy but being aware of its potential harmful affects will keep us safe. I am sure that taking antioxidants is protecting the body from free radical cell damage, especially of the alveoli and terminal bronchi, were the magic takes place. I also suspect that exercising afterward would flush any free radicals out of the lungs and move the oxygen saturated fluid deeper into the bones.
The production of free radicals is a benefit of exercise(hormesis), just as the production of free radicals from HBOT is a benefit as it upregulates our bodies own production of anti-oxidants. I am leery of taking too much Vitamin C around my Hyperbaric sessions as I am thinking I may be short-circuiting my bodies own production of anti-oxidants. At some point in the future I may not have access to Vitamin C, so having my body capable of creating anti-oxidants would be a good thing. I regard it as similar to being metabolically flexible. Before going Keto, I was in sugar burning mode. Now I can burn either sugar or fat, which is much more flexible.