Some days you need a little extra something-something to hit the gym and hit it with intensity.
What is pre-workout, exactly?
However, therearecaffeine-free pre-workout formulas, typically marketed as non-stim pre-workouts.

These versions wont give the same jolt of energy as one that contains a caffeine derivative (duh).
Want to try a pre-workout before your next gym sess?
Scientifically speaking, calories are energy units that the body uses like a car uses gasoline, explains Matheny.

registered dietician and CEO of supplement and snack company Promix
Calories, of course, come from the carbohydrates, protein, and fats in food.
So… are pre-workout supplements enough?
Most pre-workout supplements are no- or low-calorie, says Matheny.

That might be useful for morning movers experimenting withfasted cardio.
But everyone else will need to pair their pre-workout mix with some good ole fashion real food.
Many people who are feeling flat in the middle of their workout routines are just dehydrated, he says.

And dont forget bedtime: You also want to confirm youre sleeping enough, Matheny adds.
As Matheny puts it, Its always best to cover the basics before adding in supplements.
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registered dietician and CEO of supplement and snack company Promix


