This may be fine for the young and/or fit person, but not for the rest of us. After a major cardiac event, I always wear a heart rate monitor. My goal is to keep my heart rate as low as possible for as long as possible.

Advising that everyone get their heart rate up and keep it up may not be the wisest counsel. No disrespect intended as I normally find your posts quite informative and enjoyable.

Good health to all!