Add Yahoo as a preferred source to see more of our stories on Google. While walking or using the stair-climber or another cardio machine, you might focus on your breathing or heart rate to gauge how ...
Cardiologist Dr. Puneet Verma shared a simple 3-minute "step test" to assess cardiovascular fitness. Participants step up and down on a 12-inch platform for three minutes, completing 72 steps.
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