To the gym with your other half? It may not do your waistline any good.
Women are likely to lose weight in the morning and men in the evening, according to a US study.
And it’s far from the only striking gender difference in lifestyle choices.
From keeping fit and kip to sex and diet, we reveal why men and women are like chocolate, sorry, chalk and cheese.
Women’s mental health can be improved by eating less refined carbohydrates like white pasta.
An American study found that those who ate large amounts were a third more prone to depression.
However, cheese can help them avoid osteoporosis as they have lower bone density than men.
Meanwhile, guys can eat more dark chocolate. A study from the University of Aberdeen found that it increases blood quality in both sexes, but more so in men.
Seafood rich in zinc also works wonders for guys, generating healthy sperm and boosting immunity.
Men can argue with this, but a team from Loughborough University believes a woman’s brain works harder, multitasking, so they need an extra 20 minutes.
Sleep expert Jim Horne says: “Women are multitaskers and flexible, so they use their brains more. Therefore, their need for sleep is greater.
As for guys, they sleep better when sharing a bed with a partner, while women often feel disturbed, at least according to a report in the journal Behavioral Sleep Medicine. Lords are also more likely to be night owls than glitches.
Some 40 percent of women have regretted getting into bed on a first date, compared to just 27 percent of the opposite sex.
In fact, more than a third of guys claim to have found love after a first date ends in the sack.
But different sex positions can mean different calorie burns for him and her. She works harder as she squats over her mistress, feet planted on the ground.
For him, the best thing is for her to lie on her back, with her legs raised and behind her head.
Women should exercise earlier in the day if they want to shed belly fat and lower blood pressure, says a US study.
Research has also shown that moderate to vigorous fitness can mean a 30 to 40 percent lower risk of breast cancer. When it comes to fueling up for exercise, a pre-gym meal is fine for her, but not so good for him.
Dr. Adam Collins of the University of Surrey found that women burn up to 22% more fat because their bodies are programmed to protect carbohydrates and burn fat instead. Men tend to cut carbs.
Married men tend to be happier and healthier, but unfortunately the same is not true for their wives.
Paul Dolan, professor of behavioral sciences at the London School of Economics, warns that single, childless women are more likely to live longer.
On the other hand, guys who have married can see their careers improve and have a better chance of landing in that top one percent of earners.
They are also likely to live longer, be less prone to high blood pressure and avoid obesity.
Professor Dolan adds that married men tend to “slow down”, taking less risk and earning more money.