The average resting heart rate for a racehorse is around 28-32 beats per minute. A less fit horse might have a resting heart rate of around 30-40bpm.At maximum output, a ho â¦ rse's heart rate can reach 230-240bpm.At this rate, the heart will pump 250L/min.This is around 4-5 times the entire blood volume of the horse.he average heart rate for adults is between 60 and 100 beats per minute. If your heart rate is above or below that range â¦ then it may be a sign of a problem and you should see a doctor.