> chamber inducing a state of hypoxia, or oxygen shortage, which caused the cell regeneration.

Might actually be related to life extension through calorie restriction in this regard. This paper re calories restriction mentions:

> caloric restriction improves whole body energy efficiency by inducing the biogenesis of mitochondria that utilize less oxygen and produce less reactive oxygen species (ROS). https://journals.plos.org/plosmedicine/article?id=10.1371/jo...

Starving the body of oxygen might trigger some of the same genetic pathways as starving it of food, basically.