As Americans prepare to turn their clocks back this weekend, experts say your diet may determine how sluggish or energized you feel in the days ahead.

Though getting an extra hour of sleep should make you feel more rested, the one-hour daylight saving time shift can actually throw off the body's circadian rhythm, the internal clock that runs on a 24-hour light-and-dark cycle, especially since many people are already sleep-deprived, according to Tufts University.

The result can feel like jet lag, bringing grogginess, hunger swings, slowed metabolism and even mood changes.

Experts say the effects are especially pronounced among shift workers, children and teens, older adults, those with sleep or heart conditions and those who frequently travel across different time zones.

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