Exercising seems like an interlude in the daily chaos: you run, you sweat, you stop. End. But no, because the work continues within us. The body silently continues to burn energy even when we think we have finished our session. It’s as if, once turned on, the internal engine refuses to turn off. This is confirmed by a new study conducted by an international group of researchers from Virginia Tech, the University of Aberdeen and Shenzhen University.
The team wanted to see whether the body, after expending energy during physical activity, compensated by saving elsewhere. The answer is clear: no. In reality, moving causes the body to consume more total energy, without taking anything away from other vital functions.
The body does not “cut” elsewhere: the more you move, the more you consume
For years, scientists have wondered whether the body has a fixed energy budget, like a checking account that can’t go into the red. According to some theories, the more you move, the less energy you have left to breathe, think, digest or regulate your body temperature.
But this research has turned everything on its head: the body does not save, he adds, underlines Kevin Davy, professor of Nutrition and Exercise Sciences at Virginia Tech:
We found that greater physical activity is associated with higher calorie consumption, regardless of body type. And this growth cannot be balanced by reducing the energy spent on other functions.
To understand how energy expenditure really works, the researchers monitored 75 people between the ages of 19 and 63, from those who spend the day sitting to those who train like athletes. Each participant drank water enriched with special isotopes, which allow the amount of carbon dioxide produced by the body to be measured over two weeks. The more CO₂, the more energy consumed.
Meanwhile, sensors worn on his waist tracked his every step and movement. The mix of chemical analysis and movement data offered an accurate picture: the more you move, the more the body expends energy, period.
Even small gestures count
Research has demolished another myth: not even in periods of great effort does the body “cut off” essential functions. Continue to breathe, circulate the blood, keep the temperature stable. Nothing stops, everything simply accelerates. And there’s more: the more active people didn’t just move during training, but remained more dynamic all day. They spent less time sitting, they walked more, they moved even without realizing it, as Kristen Howard, a researcher at Virginia Tech, explains.
Those who are physically active tend to move more even in everyday life. “It’s as if, once the mechanism has been started, the body no longer wants to stop.
It’s a virtuous circle: regular physical activity not only makes you burn more, but it transforms habits. You get up more often, you prefer to walk instead of standing still, you stretch between emails. It’s not just a “gym”: it’s a moving, widespread, continuous lifestyle. Every gesture, even minimal, contributes to daily energy consumption.
The body has no fixed limits
This finding supports the so-called additive theory of energy expenditure, according to which each type of movement adds to the others, rather than subtracts. There is no hard limit: the more we move, the more our system expands. It’s why those who exercise regularly tend to have a more active metabolism, better cardiovascular health, and even a more stable mood.
However, there is one important detail: nutrition. According to researchers, eating too little during physical activity can become counterproductive. If there is a lack of fuel, the body may react by slowing down to protect itself. On the contrary, a balanced diet allows the body to make the most of physical activity, transforming movement into lasting energy.
As Davy concludes:
We still need to understand under what conditions the body can actually compensate for energy expenditure, but one thing is clear: we are made to move. And to continue doing so.
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