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Washington DC, Nov. 9: Did you know! Your diet and sleep pattern regulate the amount of calories you burn.
Researchers found that people at rest burned 10% more calories late in the afternoon and early evening than early in the morning.
published in the journal Current Biology.
They reinforce the important role of the circadian clock in the regulation of metabolism. They also help explain why irregularities in meal and sleep schedules due to shift work or other factors can make people more likely to gain weight.
"Doing the same thing at a time of day consumes a lot more calories than doing the same thing at a different time of day surprised us," said lead author Kirsi-Marja Zitting, Harvard Medical School.
Determine changes in metabolism during the day, apart from the effects of activity, sleep-wake cycle, and diet, researchers studied seven people in a special laboratory without any indication on what time he was outside. There were no clocks, windows, phones or the internet. Participants in the study had badigned hours to go to bed and wake up. Each hour, these hours were adjusted four hours later, the equivalent of a three-week trip to the west, crossing four time zones.
"Because they were doing the equivalent of circling the globe every week, the internal clock of their body could not stand and so it oscillated at its own pace", explained the co-author, Jeanne Duffy. "It allowed us to measure the metabolic rate at all biological hours of the day."
The researchers found that the participants' respiratory quotient, which reflects the use of macronutrients, also varied by circadian phase. This measurement was the lowest in the evening and the highest of the biological morning.
The results provide the first characterization of a circadian profile in fasting resting energy expenditure and fasting respiratory quotient, decoupled from the effects of activity, sleep-wake cycle and loneliness. food.
"It's not just what we eat, but eating – and resting – affects the amount of energy burned or stored as fat," explained Duffy. "The regularity of habits such as eating and sleeping is very important for general health."
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