A Canadian study has found that women have a circadian rhythm, which runs between 1.7 and 2.3 hours ahead of their male partners.
According to the study published in the journal Proceedings of the National Academy of Sciences, this means they are likely to feel more tired earlier in the evening than men. The researchers say these differences are mainly due to the influence of our sex hormones.
According to Dr Adam Taylor, a senior lecturer in anatomy at Lancaster University Medical School: “These hormones can affect our health in everything from how fast our hair grows to how quickly we blink and even how rapidly we digest food and alcohol.”
A woman’s heart is about two-thirds the size of a man’s, weighing an average of 120g, compared to an average 180g in the male.
However, because the female organ is smaller, it beats slightly faster to make up for its size.
While the average male heart beats 70-72 times a minute, an adult woman’s beats 78-82 times a minute.
However heart experts say this has no effect on women’s overall heart health during their lifetimes or the type of heart problems they develop.