Do our friends make us fatter? Thin people who socialise with the obese 'will get heavier'
It may seem like bad news for the thin among us, but socialising with people heavier than yourself could make you put on weight.However, it could be good news for the larger among us, because the process can theoretically work in reverse too, according to research in the U.S.
Scientists Nicholas Christakis and James Fowler examined 32 years of data collected during a study of people's hearts in the town of Framingham in Massachusetts.
See the video below...
The figure was made more even more stark when compared to the likelihood of the same happening between genetic relations - 40 per cent - and spouses, where the weight increase is an average of 37 per cent.
As an example of how it affects people who aren't friends, the pair studied the weights of neighbours and found no link in weight increase.
'I think our findings reinforced the idea that because people are interconnected, their health is interconnected,' said Dr.Christakis on NPR.com.
But here is the good news. The process could be reversible too, helping obese people to lose weight.
Dr.Christakis said: 'The same kind of phenomenon that contributes to an obesity epidemic could potentially — potentially — be harnessed to contribute to a reversal of the epidemic, because it's equally the case that one person losing weight contributes to the other people around them losing weight.'
The research comes with a moving diagram which shows obese people - measured by a BMI greater than 30 - as yellow circles and thinner people as green circles.
The yellow circles gravitate towards each other, as do the green circles, particularly when they are linked by friendships and family ties.
In the diagram people are linked by purple lines - genetic family ties - and grey lines - friends and spouses.
The network of circles gets more dense as more ties appear between the circles, and the entire network gets heavier over time.
There are more obese people at the centre of the diagram, where there are more ties, while the people with fewer ties, towards the outside of the circle, are mostly thinner people.
NPR science blogger Jonah Lehrer said that the data shows that 'obesity spreads from person to person, much like a contagious virus'.
LINK TO VIDEO
Read more: http://www.dailymail.co.uk/health/article-1382038/Do-friends-make-fatter-Thin-people-socialise-overweight-people-weight.html#ixzz1L89N7lwP
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