" .. increased risk of heart attacks and other cardiac problems after storms, often due to overexertion while shoveling show .."

So called "snow shovels" are a major contributor - they are oversized/wide on the erroneus assumption that snow is light and fluffy ! NOT ! More often than not it is in fact wet and heavy, frozen in place ..... For shoveling snow get a regular steel shovel, about 1Ft. square with a long wood handle. It will be much easier to manage, stand considerable abuse, last forever and best of all - shoveling snow becomes much easier and more effective. Plastic is useless, aluminum will not maintauin a sharp edge.