{{ Atrial fibrillation is not a heart attack and
has nothing necessarily to do with aerobics or any other activity.}}

I misspoke, thinking strokes were like heart attacks...It has to do with
heart strokes. And there IS evidence positively correlating AF and aerobics.
Whether or not you choose to believe the evidence or criticize it is up to
you.  Noone is saying "necessarily"...you made that up, it's not in the
research.  Correlative evidence is just that...not saying things are caused
or necessary, but that they are correlated.  Go back and read the link I
sent.

{{If this makes any sense at all, which I doubt, it is that the amount of
exertion possible when attempting to duplicate bicycle activity with the
untrained leg was significantly less than that with the trained leg. The
conclusion stated is idiotic.}}

If the conclusion is idiotic, how did you manage to understand it well
enough to repeat it? ...penalty: run around the block 50 times!

But seriously, most people are so caught up in the aerobic thing, thinking
it will help them get it better shape.  They understand that it is an
inferior way to build muscle compared to weight training, so they move on to
argue that it improves VO2 max.  It seems obvious to you and I, but to most,
the conclusion that muscular strength, not aerobic activity is responsible
for increased VO2 max is hard to believe, because they want to believe that
you have to do it, because that is what the medical industry has been
telling people for so long to do.  Just like they tell them to eat a low-fat
high grain diet.

Judith