According to findings, improving and maintaining adequate sleep duration could decrease weight and represents a viable intervention for obesity prevention and weight loss programs.

• This randomized clinical trial was conducted to determine the impact of sleep extension on objectively evaluated energy intake in adults with overweight in their usual home environment.

• Among 80 adults with overweight and habitual sleep less than 6.5 hours per night, those randomized to a 2-week sleep extension intervention significantly decreased their daily energy intake by about 270 kcal than the control group.

• No significant difference in total energy expenditure was observed between the sleep extension and control groups, yielding a negative energy balance with sleep extension.