Poor sleep habits, such as inadequate sleep duration, irregular sleep patterns, and disrupted sleep, can contribute to weight gain in several ways. Inadequate sleep can lead to hormonal imbalances, such as increased levels of the hunger hormone ghrelin and decreased levels of the satiety hormone leptin, which can lead to overeating and weight gain. Poor sleep quality and duration can also increase stress levels and decrease motivation for exercise and healthy eating, further contributing to weight gain.