Andrew Huberman· PhD
So here's what I want you to do. In this case, your heart rate recovery is the better metric. So I want you to get up to a maximum heart rate and then test your heart rate recovery. And what you should be looking for there is about a half a beat recovery per second. So you're going to get up to a place where you reach absolute terrible exhaustion, maximum fatigue, test your heart rate, and then count. Within 60 seconds, you should have, again, that half a beat per second. You should have a heart rate recovery of 30 beats per minute. Within the next minute, so two-minute recovery, it should be, again, half that, so 60 beats. Those are rough numbers to go by. And your three-minute recovery is, again, half of that again.