> doing 60+ min of high heart rate cardio or intense anaerobic exercise a day,

Per day?? Does anyone really do that? I aim for a bit more than 60 minutes a week.

> If you're fairly physically active

> (meaning well above most state-recommended guidelines)

So yeah some people do. High level amateur and pro athletes put in much, much more. I view it as a cheat code to lead a longer, healthier life. While my less active friends are complaining about lower back pain shuffling into their cars, I'm able to carry large boxes up many flights of stairs with minimal issue.

FWIW I used to have awful digestion issues before I started working out regularly and now have gone back to my teenage baseline of guzzling peppers and chili oil.