A Little Regular Exercise Extends Men's Lives

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Every extra point in MET conferred a 14 percent reduction in the risk for death among black men, and a 12 percent reduction among whites. Among all participants, those categorized as "moderately fit" (5 to 7 METS) had about a 20 percent lower risk for death than "low-fit" men. "High-fit" men (7 to 10 METS) had a 50 percent lower risk, while the "very high fit" (10 METS or higher) cut their odds of an early death by 70 percent.

"The point is, it takes relatively little exercise to achieve the benefit we found," noted Kokkinos. "Approximately two to three hours per week of brisk walking per week. That's just 120 to 200 minutes per week. And this can be split up throughout the week, and throughout the day. So it's doable in the real world."

Alice H. Lichtenstein, director of the Cardiovascular Nutrition Lab at Tufts University's USDA Human Nutrition Research Center in Boston, agreed.

"What this finding demonstrates is that levels of physical activity that should be achievable by anyone can have a real benefit with respect to risk reduction," she said.

"What's really important to understand is that you don't need special clothes, special memberships, special equipment," added Lichtenstein, former chairwoman of the American Heart Association's nutrition committee. "It's something everyone can engage in. And although we don't know from this research that this applies to women as well, there's no reason to suspect that it wouldn't."

More information

There's more on physical fitness at the U.S. Centers for Disease Control and Prevention.