Muscle mass beats BMI as longevity predictor

This is Scientific American 60-second science.

I'm Christopher Inthaliata. Got a minute?

>> I'm Christopher Intagliata. Got a minute?

Doctors routinely measure a patients' body mass index or BMI

>> Doctors routinely measure a patient's body mass index, or BMI.

and if that weight to high ratio points to obesity, the doctor might prescribe exercise to shud the extra pounds.

>> And if that weight-to-height ratio points to obesity, the doc might prescribe exercise, to shed the extra pounds. 

But when it comes to longevity, a focus on weight loss may be misplaced.

Because a BMI isn't actually a very reliable indicator of life span 

>> Because BMI isn't actually a very reliable indicator of life span. 

More useful measure, some professions say might be muscle mass.

>> A more useful measure, some physicians say, might be muscle mass.

Researchers analyze BMI and muscle mass stator more than 36 seniors in a long-term study.

>> Researchers analyzed BMI and muscle mass data from more than 3,600 seniors in a long-term study.

 

They tracked seniors have died a decade later.

>>  And they tracked which seniors had died, a decade later.

Turns out BMI wasn't predicting chance of death. but muscle mass was. 

>> Turns out BMI wasn't much good at predicting chance of death.

More muscle meant better odds of survival. 

>> But muscle mass was: more muscle meant better odds of survival.

The study of here is American Journal of Medicine. 

>> The study appears in The American Journal of Medicine.

There's no cause and effect here. just correlation for now

>> There's no cause-and-effect here—just correlation for now. 

But the study author Pricey Kanthen of UCLA has this recommendation.

>> But study author Preethi Srikanthan, of U.C.L.A., has this recommendation:

"get up and stop moving. focus on trying to maintain the maximum amount of resistant strain level as you can,

>> "Get up and start moving. Focus on trying to maintain the maximum amount of resistance training that you can,

and stop worrying about dropping calories."

>> and stop worrying so much about dropping calories."

Which could take a little weight off of your mind too. 

>> Which could take a little weight off your mind, too.

Thanks for the minute.

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