If you're doing far more sitting than moving, you may believe it will be hard to find an exercise regimen you can do that will make you healthier. Actually, it's no sweat.

A new study from Oregon State University found that doing even very light physical activity can make a sedentary person healthier. The problem is that most older adults get virtually no exercise. Researchers said that more than 50 percent of American adults are "incredibly sedentary couch potatoes."

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Researchers said among the light exercises that can increase health for sedentary people are mild calisthenics, working in the garden, housework or a leisurely daily stroll. As long as adults "spent more time moving than sitting" they lowered their risk of health problems, researchers said.

The study was published in the journal Preventive Medicine.