“. . . the fundamental object of contention in the life struggle, in the evolution of the organic world, is available energy.”
Ludwig Boltzmann (1886)
I like this title “Intrinsic Heart Beats in Humans,” better that the previous article’s title, so there it is. You are still getting the “Big, free heart,” garnered from The Internet, though. This article will begin in the middle of the last one, where it got very interesting.
At the findings of The Heart Rate Working Group. They found that human resting heart rates were “independent of other factors,” in signaling risks to mortality. This was found to be valid both for humans, “with cardiovascular disease and without.” WoW!
Right now I feel the same as when I discovered the video-recorded speeches of Prof. Dr. Carl Sagan on Greenhouse Gas Emissions and Global Warming from 1990.
“Denial is not just a river in Egypt,” he quipped then, trying to warn us of the choices we faced.
“THEY KNEW!” also springs to mind, or should have… Or something. All those schemes to lose weight by speeding up your metabolism, increasing your potential – in other words – to “rust faster”. They would only limit any potential you had for living longer. WoW! I do not know. I am no physician. I was an W-EMT once. I just present other clinicians research and data.
Rest Heart Rate and Life Expectancy
HERBERT J. LEVINE, MD, FACC
“Among mammals, there is an inverse semilogarithmic relation between heart rate and life expectancy. The product of these variables, namely, the number of heart beats/lifetime, should provide a mathematical expression that defines for each species a predetermined number of heart beats in a lifetime. Plots of the calculated number of heart beats/lifetime among mammals against life expectancy and body weight (allometric scale of 0.5 x 10^6) are, within an order of magnitude, remarkably constant and average 7.3 ± 5.6 x 10^8 heart beats/lifetime. A study of universal biologic scaling and mortality suggests that the basal energy consumption/body atom per heart beat is the same in all animals (~10^8 O2 molecules/heart beat). This data yields a mean value of 10 x 10^8 heart beats/lifetime and suggests that life span is predetermined by basic energetics of living cells and that the apparent inverse relation between life span and heart rate reflects an epiphenomenon in which heart rate is a marker of metabolic rate. Thus, the question of whether human life can be extended by cardiac slowing remains moot and most likely will only be resolved by retrospective analyses of large populations, future animal studies and clinical trials using bradycardic therapy.” 
[J Am Coll Cardiol 1997;30:1104–6) ©1997 by the American College of Cardiology]From the Department of Medicine, Division of Cardiology, Tufts University School of Medicine and New England Medical Center, Boston, Massachusetts. Dr. Herbert J. Levine, New England Medical Center] ©1997 by the American College of Cardiology Published by Elsevier Science Inc.
 PDF© article here downloaded from GoogleScholar©: 82257297