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Intuitively, why does a stronger heart cause blood pressure to go down? The answers I've found from a cursory google search seem to indicate that it has to "work less hard" to pump the blood and that it "beats more slowly," but I do not immediately understand the implications of this.

Furthermore, if it is due to a slower heart beat in a stronger heart that blood pressure is lower, then how does (/is it true that) blood pressure remains lower in those with a stronger heart during exercise? Wouldn't a stronger heart beating just as fast as a weaker heart lead to higher blood pressure?

Thanks for any help. :)

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  • $\begingroup$ Welcome to Biology.SE! I think this might be a better fit for Medical Sciences. ——— Please also take the tour and then go through the help pages starting with How to Ask questions effectively on this site. Thanks! 😊 $\endgroup$
    – tyersome
    Jan 31, 2020 at 3:57
  • $\begingroup$ My intuition may be wrong, but see Bernoulli’s equation for an incompressible fluid. Modeling the circulatory system as a closed loop, the pressure exerted on arterial walls by blood decreases with increasing blood velocity. Assuming a stronger heart pumps blood faster, a stronger heart should reduce blood pressure compared to a weaker heart and slower blood flow. $\endgroup$
    – acvill
    Jan 31, 2020 at 4:27
  • $\begingroup$ Use of the word “stronger” is not clear. The flow rate needs to be considered and those who are very fit have a lower resting heart rate, a higher maximum and tend to need a lower beats per minute when doing the same exercise level as an unfit person. $\endgroup$
    – Solar Mike
    Jan 31, 2020 at 5:19
  • $\begingroup$ A heart that is stronger (bigger; thicker walls) does not need to work stronger. In usual circumstances, the strength of a healthy heart has nothing to do with blood pressure. $\endgroup$
    – Jan
    Jan 31, 2020 at 12:39

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