“I’ve heard that cardiovascular exercise can prolong life; is this true? A: Your heart is only good for so many beats, and that’s it...don’t waste them on exercise.”
If your presumption about a fixed number of heart beats were true (there is no evidence that it is), then exercise would prolong your life immensely.
With exercize, I triple my heart rate for 1.5 hours per week. The aerobic exercize reduces my resting heart rate (after becoming conditioned in 6-12 weeks) by 1/3 for the other 166.5 hours.
Basic math 166.5 x 1/3 = 55.5 hours. Subtract the 3 “extra” hours from increased heart rate while exercising, and you have a net gain of 54 hours per week, or 32 percent less beats per week.
By your logic, exercising for aerobic fitness will increase your life expectancy by a little less than one third.
That excuse does not fly. I am not trying to run your life. Exercise is hard work, and the discipline to do it does not come easily. It is clear, from your desire to rationalize, that you are thinking about it.
I can tell you from experience, that my life is much better for regular exercise, even though it is hard work to do, and I would gladly avoid it if I thought it was not worth it.
Really? You’re that dense? That’s too funny. It’s a joke.