Sal Di Stefano

So, so what's the difference?

So here's why, here's why cardio does that.

When you're burning calories manually, your body aggressively tries to figure out how to balance out your caloric output with your caloric intake or your caloric intake with your output aggressively.

So if you burn X amount of calories doing cardio, it will bump your appetite up

to try to drive you to eat more.

It'll reduce activity outside of the cardio.

So they've actually done studies where they put trackers on people.

They work out hard in the morning.

They move less during the day, like without even realizing it.

So it'll try to balance it out that way.

It'll also pare muscle down to reduce your calorie outputs to try and make you more efficient.

So this is why weight loss in studies with cardio and calorie restriction results in about 40% of the weight being from muscle.

So you lose 10 pounds, like four pounds come from muscle.

And it's not burning muscle down.

You said breakdown.

That's not necessarily what's happening.

It's more of an adaptation process.

Your body's just trying to become more efficient with calories.

So that's what cardio does.

Now, why cardio?