Are you gaining weight and have no idea why? The culprit could be your bedtime. If you don't get enough sleep at night, it doesn't matter what you eat and how much time you spend on the treadmill.

If you're exhausted, your diet just won't work. Why? Sleep deprivation affects the hormones that control appetite and weight reduction. According to Jewish World Review, physical exhaustion thwarts your diet efforts in both obvious and unexpected ways.

If you don't get enough sleep at night:

• You'll eat more during the day in an attempt to stay alert.
• The hormones that control appetite and weight reduction won't function properly.
• Your resistance to insulin will be increased, which in turn interferes with your ability to digest and process carbohydrates. And that can make you gain weight.