valerie wrote: You have that a little backwards.
Exercise lowers your heart rate. In other words, people that are very active have
a lower sedentary heart rate. This is a major reason why it is important to be
active.
Correct - The heart rate does increase temporarily during exercise - and in a healthy heart, it will not kill you - In some intense workout and exercises you can see pulse rate go above 150, so you are in a state of tachy during that time, that same rate would be abnormal during rest
So for example someone who is not active might have a resting pulse of 75-80, in some cases some might have 80-99, whilst some very active people can see lower resting rates in the 60-70, it's not uncommon to see athletes with low resting pulse (50-60). Whether a low resting pulse will make you live longer, I do not think so, there are many factors that will determine your longevity. The heart does not have a pre-programmed number of beats before it stops, what causes it to stop is due to compromised or blocked blood flow to the heart, or when the normal heart rhythm is sent out of whack and is not taken care of. There are other factors to determine your longevity, like your history, health, disease, risk factors, overall health including family history / risk, cholesterol, diabetes, management of BP, etc. Heart rate alone is not THE determining factor of longevity. There are people who smoked and indulged in the wrong foods all their lives and made it to 100+. Whilst there are very active people who ate healthy and were active and did not make it to 50.