Although I do use our local gym occasionally, my exercise is primarily on my own property.  I turn a large compost pile several times each summer, and spade my 27' (9m) by 54' (18m) garden by hand several times each growing season.  In the winter I shovel my driveway without using power equipment.  In the winter, shoveling snow when I'm wearing cold, wet diapers is not my idea of pleasure.