Researchers found other signs of men reaching that pivotal point include thinking about a change in career, moisturising and having a daily probiotic drink.
The poll of 2,000 adults found that taking part in extreme sports and investing in hi-tech gadgets were also indicators of a mid-life crisis.
The study, commissioned by Jeep, revealed a third ofrespondents felt the stereotypical image of a mid-life crisis was outdated.
However, 56 per cent of men are likely to undergo a “lifestyle overhaul” when hitting their mid-40s, the poll found.
Cycling to work rather than driving and signing up to Twitter and Facebook were also seen as signs of a modern-day mid-life crisis, as were splashing out on a prestige watch and trying the latest diets.
A spokesman for Jeep said: “The traditional image of a mid-life crisis is dead and buried.
“Nowadays, it’s more about living for the moment and leading an active and healthy lifestyle.
“It’s unfair to label many of the things in the list as signs of a crisis when many of them will have a positive impact on a man’s life.
“Getting fit, taking part in extreme sports and overhauling your diet are all things which should be commended.”
The study revealed that half of men in their 40s and 50s start to get fitter and throw themselves into extreme sports.
Higher disposable incomes, being accomplished at work and being more health and image-conscious were also listed as reasons men get adventurous.
The poll found the typical mid-life crisis happens at the age of 45 and lasts a year and three months.
Half of respondents said that any man who looks after his appearance is often wrongly accused of having a mid-life crisis.
Outdated signs of a mid-life crisis included buying a convertible, having an affair and dyeing hair, as well as taking up golf and going to night clubs.