• I read that the consumption rate (Cal) of stronger muscles while resting is higher than that of less dense muscle tissue.
  • Kleiber's Law and Rate of Living Theory states that organisms have circa the same heartbeats per lifetime (~one billion [which still has some exceptions])
  • Also assume that the extra exercise is counteracted (by augmented caloric input or something) so that the benefits of exercise is disregarded.

If you don't live shorter because of it, then why?

  • Your question is actually: is lifespan capped by the number of heartbeats?
    – jiggunjer
    Jun 19, 2016 at 3:52
  • Yes, but I wanted to know about exercising in particular, if that changes anything.
    – nelomad
    Jun 19, 2016 at 5:07
  • Then the three points in your question are meaningless.
    – jiggunjer
    Jun 19, 2016 at 8:27

1 Answer 1


Persons who do regular physical exercise have a lower heart rate while they are resting (or not exercising):


Hence, their hearts will be beating same number of beats over a longer period of time.

In addition, a number of trials have shown that regular physical exercise is associated with significant health benefits and lower incidence of serious health problems, e.g.:


  • thank you! I'm just wondering; how did you find that first source?
    – nelomad
    Jun 24, 2016 at 2:45
  • 1
    Pubmed is a regular source to search for medical journal articles. I just picked the first article that showed this aspect. There are many other references also on this topic. The second reference is, of course, one of the top cited articles from a very high ranking journal.
    – rncardio
    Jun 25, 2016 at 18:13

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