Biol­o­gists from Great Britain found the answer to a pop­u­lar ques­tion.

Biol­o­gists from the Uni­ver­si­ty of Roe­hamp­ton in the UK were able to estab­lish why exer­cise often does not help over­weight peo­ple get rid of excess weight, TASS reports, cit­ing a pub­li­ca­tion in the sci­en­tif­ic jour­nal Cell Biol­o­gy.

How to lose weight correctly?

Accord­ing to Pro­fes­sor Lewis Halsey, as a rule, doc­tors advise get­ting rid of 500–600 calo­ries dai­ly through diet and exer­cise to lose weight. “It turns out that these rec­om­men­da­tions do not take into account that the body of some obese peo­ple reduces rest­ing ener­gy intake and com­pen­sates for exer­cise-relat­ed loss­es,” he says.

Halsey and his col­leagues observed how the body of each of 1.7 thou­sand over­weight vol­un­teers burned extra calo­ries — both dur­ing exer­cise and at rest. To do this, study par­tic­i­pants drank water with deu­teri­um and oxy­gen-18 atoms for sev­er­al weeks. By check­ing the pro­por­tion of these sub­stances in bio­log­i­cal flu­ids, sci­en­tists under­stood how much of the result­ing calo­ries the sub­jects’ bod­ies burned or stored.

It turned out that over­weight vol­un­teers who tried to lose weight through exer­cise had an unusu­al­ly eco­nom­i­cal ener­gy expen­di­ture at rest: it turned out that these peo­ple got rid of only 50 per­cent of the calo­ries that should have been burned through exer­cise. It is known that peo­ple of nor­mal weight lose about 72 per­cent of the calo­ries burned dur­ing exer­cise.

Now it is dif­fi­cult to say what explains this fea­ture: is it due to changes in metab­o­lism due to obe­si­ty, or is it a con­se­quence of a ten­den­cy to lead a seden­tary lifestyle and gain excess weight. Through future obser­va­tions, the researchers want to find out.

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