There might be some truth to the old saying that “early to bed, early to rise” is a pillar of good health.
A new study found that people who stay up late and sleep in might be at higher risk for type 2 diabetes and heart disease than those who prefer to go to bed and wake up early.
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The study — published in the journal Experimental Physiology — found that night owls were more sedentary, exercised less and burned less fat at rest and while active than early birds in the study. It also indicated night owls required more insulin to get energy.
The study found early birds “utilized more fat during rest and exercise independent of aerobic fitness when compared with” night owls. They also were more physically active throughout the day compared to those who stayed up late and slept in.
Sleep preferences are believed to be inherited and may alter the natural circadian rhythm of humans.
The study organized 51 adults without heart disease or diabetes into groups of early birds and night owls based on their preferences. Participants ate a controlled diet and fasted overnight, while their activity levels were monitored throughout the week.
