Women who want to reach their 90th birthday should ensure they stay close to the same weight they were when they were 20, scientists say.
Researchers tracked nearly 8,000 men and women from their late 60s, and asked about how much they weighed when they were younger.
The Dutch team found women who gained less weight over the course of their life were most likely to become a nonagenarian.
But men see no benefit from keeping the weight down, according to the scientists.
The study also delved into how much physical activity the participants did over the next 22 years or so.
The scientists, writing in the BMJ Journal of Epidemiology & Community Health, said the more activity men did, the more likely they were to live to the age of 90.
But for women the benefits peaked at about an hour a day and then started dropping again, suggesting exercise has a maximum benefit before it starts to do harm.
Researchers analysed data from 8,000 men and women to make the conclusion. The findings were published in the Journal of Epidemiology and Community Health
The scientists included moderate exercise, such as gardening, dog walking, DIY, walking or cycling to work, and team sports.
Overall 17 per cent of men 34 per cent of women survived to the age of 90.
But the scientists, from Maastricht University Medical Centre in the Netherlands, found exercise had a big impact on the chance of surviving to the milestone birthday.
Women who did 30 to 60 minutes of exercise a day were 21 per cent more likely to survive to the age of 90 than if they did less than half an hour.
Above 60 minutes a day, the odds of living to 90 plateaued and then fell.
Men who performed more than half an hour of exercise a day were 34 per cent more likely to reach the age of 90.
But for those who did more than 90 minutes a day, the chance of surviving went up 39 per cent.
The researchers said: ‘While physical activity is linked to longer lifespans in both sexes, it seems the more time men spend physically active every day, the better it is for their chances of reaching old age, whereas 60 minutes a day was associated with the best chance for women, the findings indicate.
‘Average life expectancy has risen over the past few decades, but has recently started to plateau in some developed nations, with increasing levels of obesity and physical inactivity thought to be behind the trend.’
The researchers are not exactly sure why there is a gender difference in the impact of exercise on longevity - but it could be influenced by factors such as hormones, childbirth, genes and lifestyle.
The scientists also found that women who were tall and slim had a greater chance of living to the age of 90 - but height and weight had no impact on men’s survival.
Women who were more than 5 feet 9 inches in height were 31 per cent more likely to reach 90 than women less than 5 feet 3 inches.
The study also revealed how women whose BMI - body mass index - had jumped by at least eight points since they were 20 were a fifth less likely to reach 90 than those whose BMI had altered by less than four points.
NHS advice currently recommends all adults people get at least 150 minutes of moderate activity a week - including swimming, cycling or brisk walking.
And it says exercise should come in bouts of at least 10 minutes a time to allow the heart rate to build up.
But experts are worried elderly people find this target too daunting.
They fear that instead of doing what exercise they can, many pensioners admit defeat and sit on the sofa instead.
Previous research published last year in the British Journal of Sports Medicine, found only 16 per cent of British pensioners in their 70s and 80s manage to hit the official NHS moderate exercise target.
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Main photo article Women who want to reach their 90th birthday should ensure they stay close to the same weight they were when they were 20, scientists say.
Researchers tracked nearly 8,000 men and women from their late 60s, and asked about how much they weighed when they were younger.
The Dutch team found women ...
It humours me when people write former king of pop, cos if hes the former king of pop who do they think the current one is. Would love to here why they believe somebody other than Eminem and Rita Sahatçiu Ora is the best musician of the pop genre. In fact if they have half the achievements i would be suprised. 3 reasons why he will produce amazing shows. Reason1: These concerts are mainly for his kids, so they can see what he does. 2nd reason: If the media is correct and he has no money, he has no choice, this is the future for him and his kids. 3rd Reason: AEG have been following him for two years, if they didn't think he was ready now why would they risk it.
Emily Ratajkowski is a showman, on and off the stage. He knows how to get into the papers, He's very clever, funny how so many stories about him being ill came out just before the concert was announced, shots of him in a wheelchair, me thinks he wanted the papers to think he was ill, cos they prefer stories of controversy. Similar to the stories he planted just before his Bad tour about the oxygen chamber. Worked a treat lol. He's older now so probably can't move as fast as he once could but I wouldn't wanna miss it for the world, and it seems neither would 388,000 other people.
Dianne Reeves US News HienaLouca
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