1028 GMT July 26 2017
Not getting enough sleep can disrupt hormones and metabolism and is known to increase the risk of obesity, reuters.com wrote.
Lead author Dr. Chang-Ho Yun of the Seoul National University Budang Hospital, said, “Short sleep, usually causing sleep debt, is common and inevitable in many cases, and is a risk factor for obesity, hypertension, coronary heart disease, as well as mortality.
“Sleeping in may be better than napping, as the sleep may be deeper and follows the body’s sleep-wake rhythms more closely.”
To determine how weekend sleep is related to body weight, the researchers used data from a nationwide survey of more than 2,000 people who ranged between the ages of 19 and 82 years old.
In face-to-face interviews, researchers asked participants about their height and weight, weekday and weekend sleep habits, mood and medical conditions.
The study team used this information to determine body mass index (BMI), a measure of weight relative to height, and whether participants engaged in catch-up sleep on weekends.
Weekend catch-up sleep was defined as sleeping more hours on weekend nights compared to weekday nights.
On average, the participants slept nearly 7½ hours per night and had BMIs of 23, which falls in the healthy range.
About 43 percent of people slept longer on weekends by nearly two hours than they did on weekdays.
People who slept-in on weekends tended to sleep shorter hours during weekdays, but slept more hours overall across the week.
The researchers’ analysis found that those who slept-in on weekends had average BMIs of 22 while those who didn’t engage in catch-up sleep averaged 23, which was a small but statistically meaningful difference.
In addition, the more catch up sleep a person got, the lower their BMI tended to be, with each additional hour linked to a 0.12 decrease in BMI.
Jean-Philippe Chaput of the University of Ottawa in Canada, who wasn’t involved in the study, said, “Short sleepers tend to eat more meals per day, snack more, engage in more screen time and may be less likely to move due to increased sensations of fatigue when not rested.
“Getting 30 minutes of heart-pumping exercise per day can help improve sleep.
“Sleep experts said that if people need an alarm clock to wake up it is a sign that they don’t sleep enough.
“The more good behaviors we can have every day (and sustain for the rest of our lives) the better it is for the prevention of chronic diseases and optimizing health. Sleep should be one of these priorities.
“If you cannot sleep sufficiently on workdays because of work or social obligations, try to sleep as much as possible on the weekend. It might alleviate the risk for obesity.”
Yun said, “Weekend sleep extension could be a quick fix to compensate sleep loss over the week but is not an ultimate solution for chronic sleep loss.
“If average sleep duration over the week is far below the optimal amount even with weekend sleep extension, the benefits would likely dissipate.”