Elderly women wandering around the garden, walking a dog, or doing delicate housework almost cut the risk of heart disease.
They also reduce the chance for heart or stroke for the fifth.
And scientists who collected data say their research could be applicable to men as well.
They found that women between the ages of 50 and 79 who were on foot more than 5.6 hours a day were 42 percent less likely to develop coronary heart disease (CHD).
It is also less likely to get 22% less cardiovascular disease (CVD), which can lead to heart and stroke.
A group of 5,900 women was measured by fitness traitors who followed five years.
The results were applied even after taking into account factors such as smoking, alcohol consumption and more intense activity.
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Researcher Andrea LaCroix of the University of California, San Diego, says it has been shown to be "all counting movements".
She added that there are "abundance of light movements that are part of everyday life".
The study was published in the JAMA Network Open magazine.