Women who get proper sleep have low body fat
Washington: A new study has found that women who go to sleep and woke up at same time every day had lower body fat.
Brigham Young University exercise science professor Bruce Bailey studied more than 300 women from two major Western US universities over the course of several weeks and found that those with the best sleeping habits had healthier weight.
The study found that getting less than 6.5 or more than 8.5 hours of sleep per night is associated with higher body fat and that quality of sleep is important for body composition.
Women in the study were first assessed for body composition, and then were given an activity tracker to record their movements during the day and their sleep patterns at night. Researchers tracked sleep patterns of the participants (ages 17-26) for one week.
The most surprising finding from the study, according to the researchers, was the link between bed time and wake time consistency and body weight.
Study participants who went to bed and woke up at, or around the same time each day had lower body fat. Those with more than 90 minutes of variation in sleep and wake time during the week had higher body fat than those with less than 60 minutes of variation.
Wake time was particularly linked to body fat: Those who woke up at the same time each morning had lower body fat. Staying up late and even sleeping in may be doing more harm than good, Bailey said.
Bailey related consistent sleep patterns to having good sleep hygiene. When sleep hygiene is altered, it can influence physical activity patterns, and affect some of the hormones related to food consumption contributing to excess body fat.
Bailey and his team also found there was a sweet spot for amount of sleep: Those who slept between 8 and 8.5 hours per night had the lowest body fat.
The study findings have been published online in the American Journal of Health Promotion.
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