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.
World Meteorological Organisation (WMO) has poured cold water on calls to name heatwaves in the same way as storms, and says it has no immediate plans to implement such a system.
The Physiological Society - the largest group of physiologists in Europe - is calling for an improved early warning system for heatwaves in a new report set to be released today.