For an adult, it's between 60 and 100 beats per minute. A strong heart can beat fewer times per minute and still get the blood where it needs to go. A heart that's not as strong will have to beat more times per minute because it can't push the blood as hard with each beat. Check this web site for more info: www.mayoclinic.com/health/heart-rate/AN01906.
The normal pulse rate for an 88 year old man is approximately 132 beats per minute. However, the exact figure for a normal pulse rate is dependent on the individual's health condition. Usually, a man can calculate his average pulse rate by subtracting his age from 220.