resting heart rate from RR interval
2.7k Views â¢ Joshua has 690+ answers and in. RR interval is just 1/heart rate. If your heart rate is 120 beats per minute, then the RR interval is 1 minute per 120 beats, or .5 seconds.But that's not going to tell you anything meaningful for somebody who wants to talk about RR interval..7k Views â¢ Joshua has 690+ answers and in. RR interval is just 1/heart rate. If your heart rate is 120 beats per minute, then the RR interval is 1 minute per 120 beats, or .5 seconds.