Or move to Canada for a good, cheap winter workout.

Snow shovel - $29.99 at Canadian Tire
3 tonnes of friggen snow dumped on you drive over night - free.
Another tonne of hard compacted snow and ice that that friggen snow plow driver just deposited at the end of your driveway during the time that you finished shoveling and putting your shovel away in the garage - free.

Now that is a workout, my wife has muscles that you wouldn't believe!