Putting your sneakers on is half the battle, but putting purpose behind your steps is what's going to make the difference. Not sure what that means exactly? The American Heart Association (AHA) recommends a minimum of 30 minutes of moderate-intensity aerobic activity for a minimum of five days a week. "In order for exercise to be considered moderate-intensity, breathing should be heavy and holding a conversation should be difficult," Kelly explained. "One way you can track intensity is with Rate of Perceived Exertion (RPE)." On that 1 to 10 scale, you should feel like you're within the 4 to 6 range, he said.
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