re: I quit doing cardio

It’s funny this came up on recommended after clicking and searching all the stuff related to this thread.

Galpin and Huberman : How to Assess and Improve All Aspects of Your Fitness

Lots of good stuff in here that reinforces both sides of the argument. A lot about the importance of vo2 max in longevity. A lot about the importance of maintaining fast twitch muscle fibers.

Most interesting thing to me….They actually run tests on two older identical twins. One is a 35 year endurance athlete, one doesn’t exercise at all. By all normal health markers, the endurance athlete twin is healthier. Their muscle mass is identical to the gram but the one who doesn’t exercise is stronger. They biopsy their quad muscles and the one who doesn’t exercise has about 50% slow twitch muscle fibers which is normal. The endurance athlete has 95% slow twitch muscle fibers in his quads!