Ask The Doctors: May 2019

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The patients were divided into five groups based on level of fitness. The highest fitness category (comparable to endurance athletes) had the lowest mortality rate (80 percent lower than the least-fit group) even when the analysis controlled for age, gender and heart risk factors. Mortality dropped with each progressive level of CRF, with no upper limit at which the benefits declined or flattened. The benefit of high performance was seen in both genders and in subgroups older than70.
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