Mowing the Lawn

My husband is so good at mowing the lawn. We own an acre of land, and he just gets out there and uses a push mower. Our neighbors on both sides of us have offered to let us borrow there riding lawn mower, but he just says "no thanks". I gave up on mowing the lawn about 7 years ago when my allergies were so bad that I couldn't breathe for 2-3 days after I was done. I finally told him that I couldn't do it anymore. I cant mow the lawn once a week, then take 3 days to recover from it. He says it's good exercize, and who doesn't need exercize?