It just depends on how old he/she is.
Below is a link for equine cardiac info.
Yes... use this "formula" 220-your age = predicted maximum heart rate
The pulse rate for a mature horse is normal when between 35 to 45 beats per minute. (This can vary depending on age and the physical condition of the horse) How to check the pulse:There are several spots on a horse where the pulse can be felt. These are beneath the jaw, under the tail at the tailbone, or at the side of the horse's foot. If you have trouble finding the pulse, ask your veterinarian to show you these spots at your next appointment. Also, if you place your hand on the left side of the chest, just under the elbow, you will be able to feel the heart's beat. Most horses won't stand still long enough for you to count the pulse for a full minute. To simplify things, you can count for fifteen seconds and then multiply the result by four.Why check the pulse? This measures the rate and strength of your horse's heartbeat. Normally, a resting horse has a pulse of 38 to 40 beats per minute. When exercising, a horse's maximum heart rate can exceed 180 beats per minute. However, in resting horses, a heart rate over 80 can be a sign of a serious problem. If a calm horse has a pulse that is consistently over 60, it can also be a problem.
50.16
220 - age gives you your target heart rate.
What is a normal pulse rate for age 74
Depends on age
220 minus your age. If you are 25, your max heart rate will be 195bpm.
220- your age
Heart rate increases with age. Generally, if one keeps active and regularly exercises, it may prolong life.
Subtract your age by 220
60 - 80 beats per minute You can use these quations to help find your heart rate: Heart rate(220) - Age(22)= Maximum heart rate 220 - 23 (age) = 197197 - 65 (resting heart rate) = 132132 * 65% (low end of heart rate) OR 85% (high end) = 85.8 OR 112.285.8 + 65 (resting heart rate) = 150 112.2 + 65 (rhr) = 177