"A new study published in the Proceedings of the National Academy of Sciences reports that being physically active increases the total amount of energy a person uses each day. The research, led by scientists at Virginia Tech working with colleagues from the University of Aberdeen and Shenzhen University, found that this increase happens without the body cutting back energy use in other areas."
"The finding matters because while the health benefits of exercise are well established, scientists know less about how physical activity influences a person's overall "energy budget," which refers to how energy is divided among the body's many functions. How the Body Manages Energy For years, researchers have debated whether the body treats energy like a fixed paycheck or a flexible bonus system."
Being physically active increases the total daily amount of energy used without prompting reductions in energy allocated to other bodily functions. Physical activity continues to affect energy expenditure after movement ends, adding to overall daily calorie burn. Basic physiological processes and maintenance functions remain active at full levels even as movement increases, so activity adds to the energy budget rather than being metabolically offset. Two conceptual models exist — a fixed-paycheck model of reallocation and an expansion model of rising total expenditure — and evidence favors expansion across different activity levels.
Read at ScienceDaily
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