Exposure to even moderate light during sleep can increase risk for heart disease and diabetes.
Too much light at night appears to lead to weight gain, according to a report released Monday, based on studies of mice that provide fresh clues on obesity.
Getting more sleep can reduce your caloric intake, which could be a game changer for weight loss programs.
Poor sleep can weaken the immune system and make you more susceptible to colds and flu, later leading to chronic obstructive pulmonary disease (COPD).