Chubby People Live Longest (A Japan Study)

Here’s a health bulletin that has been hugging the health journals lately. I hope this would not give a false sense of security and instill complacency to our slightly overweight friends by foregoing in any physical activity.

Tokyo (June 20, 2009)– Health experts have long warned of the risk of obesity, but a new Japanese study warns that being very skinny is even more dangerous, and that slightly chubby people live longer.

People who are a little overweight at age 40 live six to seven years longer than very thin people, whose average life expectancy was shorter by some five years than that of obese people, the study found.

“We found skinny people run the highest risk,” said Shinichi Kuriyama, an associate professor at Tohoku University’s Graduate School of Medicine who worked on the long-term study of middle-aged and elderly people.

“We had expected thin people would show the shortest life expectancy but didn’t expect the difference to be this large,” he told AFP by telephone.

The study was conducted by a health ministry team led by Tohoku University professor Ichiro Tsuji and covered 50,000 people between the ages of 40 and 79 over 12 years in the northern Japanese prefecture of Miyagi.

“There had been an argument that thin people’s lives are short because many of them are sick or smoke. But the difference was almost unchanged even when we eliminated these factors,” Kuriyama said.

Main reasons for the shorter lifespans of skinny people were believed to include their heightened vulnerability to diseases such as pneumonia and the fragility of their blood vessels, he said.

But Kuriyama warned he was not recommending people eat as much as they want.

“It’s better that thin people try to gain normal weight, but we doubt it’s good for people of normal physique to put on more fat,” he said.

The study divided people into four weight classes at age 40 according to their body mass index, or BMI, calculated by dividing a person’s weight in kilograms by their squared height in metres.

The normal range is 18.5 to 25, with thinness defined as under 18.5. A BMI of 25 to 30 was classed as slightly overweight and an index above 30 as obese.

071607-fat-runners“Main reasons for the shorter lifespans of skinny people were believed to include their heightened vulnerability to diseases such as pneumonia and the fragility of their blood vessels…”

This statement begs the question, If those skinny people were engaged in vigorous sports like running in 10k races to marathons or triathlons, wouldn’t they be as fit (or fitter) to live longer than those chubby but sedentary people?

Though the study didn’t say if those involve in the experiment were engage in any form of physical activity or those thin persons were suffering from malnourishment, i have always thought that any person, regardless of their body type who engages in at least a moderate type of activity should get the same benefit of:

1.) reducing the risk of dying prematurely, thus, both should live longer,  2.) help control weight, and 3.) helps older adults become stronger and are better able to control the rigors of life’s stress.

So, what’s next for this Japanese Health Ministry Team? A 10-year, $15.5 million study that concludes  once and for all that eating French Fries is the best fuel in running an ultra-marathon?


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