High-intensity interval training (HIIT) is a more robust method for increasing mitochondrial biogenesis in muscle tissue than deliberate cold exposure.

“an exercise particularly vigorous exercise is one of the best ways to do that so one of the most powerful indicators of healthy mitochondria is the ability to generate new healthy young mitochondria called mitochondrial biogenesis vigorous intensity exercise like high-intensity high-intensity interval training I mentioned um it's one of the most powerful stimulators of mitochondrial biogenesis”

“the best way to increase mitochondrial biogenesis and muscle tissue is actually high intensity interval training. Way more robust than deliberate cold exposure.”