Why? A normal
resting heart rate is between 60-100 and he was even in that range while not resting. While a lower resting heart rate may indicate better cardiovascular shape, he also wasn't exactly resting while filming the video. Moving around, talking, maybe the stress of doing a video demo all would elevate his resting heart rate.
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So? If all those are false calls then perhaps a waste of time. But if some people get their lives saved by this was it really a waste of time? And don't tell me it depends on the people.