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| | LifeHeart.com | Blood Pressure |
 | | The heart usually beats faster in times of stress, for example, or when you're running up a flight of stairs or trying to catch a bus. |
 | | By age 12 it has dropped to around 80 beats per minute, and it continues to fall as you reach adulthood, when it averages about 60 to 75 beats per minute. |
 | | At an average adult heart rate of 72 beats per minute, the heart beats 4,320 times in an hour, 103,680 times in a day, 37,843,000 times in a year, and 2,649,024,000 times over a lifetime of 70 years. |
| www.lifeheart.com /patient/heart_basics/blood_pressure.asp (1081 words) |
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