I do not know about the claim involving oxygen but a lot of so called ancient Indian and Chinese medicine
1 is not good medicine
2 when it is good medicine a lot of the time they take something western and pretend it was a ancient Asian secret
3 Sometimes the ancient people understood proper medicine but some person does not understand what they originally meant because they used a lot of metaphors before more precise language was developed by western scientists
@Justicar
The story is that a lot of people would spend so much of their time staying still meditating that people developed exercises to prevent health problems from the meditation
Sitting prolonged in lotus is better for the health than sitting for prolonged time in regular sitting in what is called easy pose