How the body uses energy The body<\/a> spends energy like money. Breathing, thinking, digesting \u2013 all of it costs calories. For years, scientists wondered if this budget was fixed or flexible. Does the body shift energy away from other tasks when you move more, or does it just burn extra?<\/p>\n The research team decided to find out. They examined how total daily energy use changes with different activity levels. <\/p>\n \u201cOur study found that more physical activity is associated with higher calorie burn, regardless of body composition, and that this increase is not balanced out by the body reducing energy spent elsewhere,\u201d said Kevin Davy, professor in the Department of Human Nutrition, Foods, and Exercise at Virginia Tech<\/a>.<\/p>\n Testing the energy expenditure<\/p>\n The experiment was simple but clever. Seventy-five people aged 19 to 63 took part. Some spent most of their day sitting, while others trained like endurance athletes. <\/p>\n Each person drank water labeled with special isotopes of hydrogen and oxygen. Over two weeks, researchers collected urine samples to see how much carbon dioxide the body produced. The more carbon dioxide, the more energy used.<\/p>\n Participants also wore small waist sensors that tracked every step and movement. This mix of chemical analysis and motion data gave researchers an exact picture of how daily energy use changes with activity.<\/p>\n Exercise adds more body energy<\/p>\n The results broke a long-standing idea. The body doesn\u2019t cut back energy in one system to make up for energy burned through exercise. <\/p>\n Even during high activity, basic processes such as breathing, blood circulation, and temperature regulation continue at their usual rate. The total energy used simply rises as you move more.<\/p>\n \u201cEnergy balance was a key piece of the study,\u201d said Kristen Howard, senior research associate at Virginia Tech. <\/p>\n \u201cWe looked at folks who were adequately fueled. It could be that apparent compensation under extreme conditions may reflect under-fueling.\u201d<\/p>\n Daily habits matter too<\/p>\n Something else stood out. People who were more active didn\u2019t just move during workouts \u2013 they also spent less time sitting. <\/p>\n This constant light activity added up, making their daily energy use even higher. Exercise didn\u2019t exist in isolation; it changed how people lived throughout the day.<\/p>\n These small differences matter. Standing more often, walking instead of scrolling, or stretching during breaks all add to the energy<\/a> budget. <\/p>\n The body keeps burning, even in moments that feel still. This idea challenges the belief that only structured workouts make a difference.<\/p>\n Exercise keeps increasing energy<\/p>\n The study supports the \u201cadditive\u201d model of energy use. In this model, every bit of movement increases total energy burn without taking from other systems. That means the body\u2019s energy limit isn\u2019t fixed. Instead, it expands with activity.<\/p>\n Insights from the research could shift how health experts think about exercise<\/a>. Rather than seeing the body as a machine with a set fuel limit, it can be viewed as a dynamic system that adjusts and thrives with movement.<\/p>\n This explains why regular exercise helps maintain healthy weight, supports the heart, and boosts mood \u2013 it keeps every part of the system active.<\/p>\n Exercise supports lasting energy<\/p>\n For people trying to stay healthy<\/a>, this research brings a simple message: every move matters. The body doesn\u2019t cancel out effort. A quick walk after lunch, climbing stairs, or even pacing while on calls contributes to total energy use.<\/p>\n The study also hints at why under-eating during exercise can backfire. When fuel is too low, the body might eventually slow down to protect itself. <\/p>\n Staying adequately nourished keeps the system running smoothly, letting movement boost metabolism rather than strain it.<\/p>\n Future research directions <\/p>\n \u201cWe need more research to understand in who and under what conditions energy compensation might occur,\u201d said Davy. <\/p>\n Future studies may explore how extreme sports, stress, or poor diet influence energy patterns. But one thing seems clear \u2013 our bodies<\/a> are built to move and to keep moving.<\/p>\n Each stretch, step, or sprint sets off a quiet chain reaction that lasts far beyond the moment of motion. Energy doesn\u2019t vanish or balance out; it builds upon itself. <\/p>\n The study is published in the journal Proceedings of the National Academy of Sciences.<\/p>\n \u2014\u2013<\/p>\n Like what you read? Subscribe to our newsletter<\/a> for engaging articles, exclusive content, and the latest updates.\u00a0<\/p>\n Check us out on EarthSnap<\/a>, a free app brought to you by Eric Ralls<\/a> and Earth.com.<\/p>\n \u2014\u2013<\/p>\n","protected":false},"excerpt":{"rendered":"Exercise feels temporary. You run, you sweat, and then you stop. But inside the body, the story continues.…\n","protected":false},"author":2,"featured_media":241925,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62],"tags":[337,97],"class_list":{"0":"post-241924","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-fitness","8":"tag-fitness","9":"tag-health"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/241924","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/comments?post=241924"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/241924\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media\/241925"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media?parent=241924"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/categories?post=241924"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/tags?post=241924"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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