February 16, 2026

Zoned Out: So Which Damn Cardio Zone(s) Should You Aim For?

There are many reasons that Cranky Fitness stopped pretending to be a blog about fitness, and became Just Cranky instead. One of them is: health and fitness research keeps contradicting itself. Who can trust it anymore?

And yet, I can't help it: I still keep clicking on headlines and reading studies and listening to experts and watching little how-to videos. I'm frequently asking Chatty, my AI health research assistant, for her cheerfully confident yet often inaccurate advice.

But every time I'm convinced I finally know what the "best" answer is to a health question? Some new take from an equally credible source comes along and says, nope, that was all wrong! How to sort out these scientific cat fights? Who do I listen to? 

Is it best to just "zone out" and ignore it all and go with our guts? 

So I'm still struggling a bit with cardio due to hypoparathyroidism, a rare and completely bonkers endocrine disorder I managed to acquire after cancer surgery. So it feels super important to try to optimize the cardio I can get away with.

But it turns out Expert Advice has changed a bit since back in the Cranky Fitness days! So what's the surprising new twist?