Sleep Loss Packs on Pounds: Study Reveals Link

New research indicates that even a modest reduction in sleep can lead to measurable weight gain. Participants who reduced their sleep by 90 minutes each night for six weeks gained an average of one pound. This occurred because sleep loss was associated with increased sedentary time during the day.

For men and postmenopausal women, who are at higher risk for overweight, this sedentary time increased by nearly 30 minutes. Researchers noted that this extra inactive time was not simply due to being awake longer, suggesting a direct behavioral change.

The study's findings build on previous research linking insufficient sleep to other adverse health outcomes. Earlier studies by the same team showed sleep restriction increased insulin resistance in women and elevated inflammatory cells in men and women at risk for heart disease.

Experts emphasize that while a one-pound gain over six weeks may seem small, the cumulative effect over a year could be clinically significant. They also noted that about one-third of American adults do not get the recommended 7-9 hours of sleep per night.

This lack of adequate sleep not only increases the risk of obesity-related conditions but also stimulates hunger hormones, potentially leading to overeating. The study suggests that improving sleep could have positive health benefits for those who consistently get too little rest.