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An investigation was made of the available data on heart rates and maximum lifespan of a number of vertebrates from a variety of sources; only data pertinent to resting adult non-anesthesized homeothermic mammals and birds in a state of thermal neutrality were subsequently analyzed. All known hibernators were excluded because of their extreme, and largely unknown, range of heartbeat from season to season. Plots of heart rate (beats per minute) against reciprocal of lifespan in years showed surprisingly good fits (r = +0.90 for mammals and r = +0.64 for birds). Computation of the total number of heartbeats in the maximum recorded lifespans of the mammalian and avian species involved in this study showed that the mean cumulative heartbeat number for 31 mammalian species was 100 +/- 8 S.E.M. x 10(7) beats and for 23 avian species was 326 +/- 22 S.E.M. x 10(7) beats. This paper documents this analysis, which supports the concept of a close similarity in lifespan heartbeats among mammalian species and among avian species.
What are the "Billion Heart Beats"? The term refers to an observation/rule that all mammals will have an expected life-span that will be the equivalent of their heart beating 1 billion times. The rate at which a mammal’s heart beats is relates to the animal's size in an inverse way, which means that the greater the body mass the slower the heart rate will be. For example, an elephant’s heart beats very slowly in comparison to a mouse. The average life span of an elephant is around seventy years whereas a mouse will only live for a couple of years, yet their hearts will have beaten a similar number of times by the time they die.
As animals get bigger, from tiny shrew to huge blue whale, pulse rates slow down and life spans stretch out longer in tandem, so that the number of heartbeats during an average stay on Earth tends to be roughly the same - i.e. about a billion. There are of course other factors that will effect the longevity (the life span) of a particular animal, such as disease and environmen, but scientists have found that mammals in the wild will indeed live for about the time that it takes their heart to beat 1 billion times. In 1945 Brody originated the term Physiological time to indicate that smaller animals seem to live according to a faster time scale than large animals.
Originally posted by tribewilder
reply to post by phi1618
I think that adrenalin also plays a big part as it increases your heart rate.
Stress causes an adrenalin rush and when you think about it, our ancestors that had to fend off wild animals all the time were under a great deal of stress and had much shorter life spans.
I envision the monks having a very sedentary life without much stress.
Just a thought..
Originally posted by ANNED
I have neurosarcoidosis with bradycardia,
My heart rate runs about 56 bpm. Even if i "try" to exercise
Does this mean i will live longer if the sarcoidosis does not kill me.
Complication of sarcoidosis is what killed Bernie Mac.