WHAT IS THE HEART RATE FOR A 70 YEAR OLD MAN WHEN EXERCISING? You can roughly calculate your maximum heart rate by subtracting your age from 220. For a 70-year-old man, your MHR will be around 150. The American Council on Exercise advises exercising at between 50 and 80 percent of your MHR, which would be 75 to 120 beats per minute. Never exceed 85 percent, as this could cause cardiovascular problems. A normal resting pace for adults is between 60 and 100 beats per minute.