One type of exercise can cut your risk of developing 8 diseases
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What counts as “vigorous” physical activity?
Vigorous activity is generally defined as exercise that substantially raises your heart rate and breathing. A simple way to gauge it is the “talk test.” If you can speak comfortably in full sentences while exercising, you are likely in the low to moderate range. If you are so out of breath that you can only say a few words at a time, that is vigorous.
By Katia Hetter CNN15/04/2026