BronyMedic: BigLuca: drtfa, but my interesting factoid for the day ... Every species on Earth has roughly (very roughly) the same number of heartbeats in their lifetime -- 1 billion. Link LinkSo the average hummingbird has the same number of heart beats in its life as the blue whale. Kinda coolAt an average heart rate of 70, and assuming no variability (your vagus nerve has been severed, and you're taking beta blockers), 1 billion beats is a little under 3 years of contractions.
mc_madness: Snapper Carr: [img35.imageshack.us image 246x520]You're about 30 years too late on that.Jim Fixx's "Art of Running" is a classic book./His family had a history of heart disease.
letrole: Weight lifting is anaerobic exercise, but still builds muscle mass that is capable of consuming large amounts of oxygen.So, you develop lots of bulky muscle that your otherwise healthy heart cannot possibly sustain when you decide to do something that requires more endurance than the short bursts of exertion of wight lifting. Your body has the physical strength to cycle or run, but your heart cannot keep up with the demand.
Oznog: Driving a car doesn't make it stronger. It wears it out!
Oznog: I always thought it was strange that exercise was supposed to make you strong.Driving a car doesn't make it stronger. It wears it out!What's curious here is dogs. They can sleep like 22 hours a day and then be told it's playtime and bolt around at amazing speeds for an hour or two. WHY IS THAT?? Laziest lovable farks around, somehow in tip-top shape.
Doom MD: Even of this is true (and I'm extremely skeptical), this would be a problem for such a very small amount of the population. The article talks about differences in life expectancy but doesn't state which groups died of what. They throw in some garbage about marathon runners getting scarred enlarged hearts (I have yet to see a marathon runner present with this in my clinical practice). I would never, absent of other circumstances, advise a patient to limit their cardio to 30 minutes if they wanted to do more and are capable of such.
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