Your workout awaits you, and you intend to slay it in full-out beast mode.

But as you lace up your shoes, your tummy rumbles.

This is not a frivolous question.

Jillian Michaels

“Don’t eat a normal size meal within 60 minutes of exercise,” Michaels urged.

This causes a heart rate increase and blood vessel constriction so that maintain your blood pressure."

Why does this matter?

man tired from exercise

What aboutrunning on empty?

This, too, is a bad idea, Michaels said.

That would mean you burned 140 calories from fat, and 60 from glycogen."

apples with nut butter

In the end, Michaels pointed out, you get moretotalburn when there’s fuel in the tank.

“You’d still burn 150 calories from fat … and 150 calories from glycogen.”

“Ideally, eat something one to two hours before you train,” she advised.

“The carbs give energy.

If you want to up the intensity, Michaels suggested adding a pre-workout supplement.

“Personally, I like something with beets, matcha, and organic coffee,” she added.