Early birds use more fat for energy during both rest and exercise than night owls. Those who wake early are also more insulin sensitive, while those who stay up late are more insulin resistant, meaning they require more insulin to lower blood glucose levels and are more prone to consuming carbohydrates as an energy source over fats.
People who ranked higher for conscientiousness and lower in openness tend to be morning people, a new study reports. Researchers say the link between personality traits and morning/evening chronotypes is partly due to genetic factors.
New genetic findings related to circadian rhythm could have implications for humans, animals, and even plant life.
Study reports night-owls are more likely than early birds to underperform at work and retire early due to ill health or disability.