6 Factors That Can Affect How Many Calories You Burn

If you’ve ever been to a group fitness class where everyone’s heart rates and estimated calorie burns are displayed on a screen, you know that these statistics vary greatly from person to person. You’ve probably also noticed that, generally, men tend to burn more calories than women. But have you ever wondered why different people burn calories at such different rates, even during the same workout?

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The truth is that metabolism — an umbrella term for all the processes in your body that break down nutrients for energy, fuel growth, and more — is far from simple. “There is a constant ebb and flow of reactions that build or repair our body (anabolism) and reactions that break down food and energy stores for fuel (catabolism),” says Anya Rosen, RD, a virtual functional medicine practitioner based in New York City. “It is an extremely complex topic that is very challenging to research,” she adds. Various factors play into how fast or slow you’re burning calories at any given time. Here are the six that experts say have the greatest impact on how many calories you burn while working out.

1. Body Weight

“Generally, the more you weigh, the more calories you’ll burn per session,” says Kyle Gonzalez, a San Francisco–based certified strength and conditioning specialist and performance coach at Future. “Calories are just a measure of energy, so the more you weigh, the more energy it takes to move your body.” Put differently, of two people with different weights, the one who weighs more will burn more calories, because they have a greater energy expenditure when moving.

https://www.everydayhealth.com/fitness/factors-that-can-affect-how-many-calories-you-burn/