On 2005-12-08, Jose wrote:
Snow shoveling is a major cause of heart attacks.

Any idea why? What is different about snow shoveling vs other kinds of
excercise?

Probably because the people who die of heart attacks when snow
shovelling are getting the first exercise they have had all year (on top
of a probably already bad diet). I doubt if snow shovelling carries any
more risk for people in reasonable shape (apart from slipping on ice and
breaking bones, I suppose). I'd argue that the snow shovelling in that
case is not the cause of the heart attack - the heart attack is like the
latent image on a film, just waiting for something to develop it.

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