There are very few things that people agree on, other than the laws of physics and the inevitability of death and taxes. Opinions differ on most topics, even beyond politics and religion. But that makes life interesting. Wouldn’t it be terribly dull if we all agreed about everything? So it was a surprise to me to realize that there is one thing that everyone seems to accept as fact. Nobody denies it or feels the need to argue about it: Regular physical exercise is good for the health. I can’t find anyone who disputes that general principle. Of course, some …