First of all why not? We should all be eating heathy and excercising... getting plenty of rest is good too.
When I think of lawn care I think about whats in the soil, how it has been treated in the past and who is using the lawn. Chemical fertilizers and weed controls add salt to the soil season after season and year after year. This damages the soil and creates a sterile environment where it's difficult for beneficial insects to live. It should be a natural healthy soil where there are certain beneficial insects (like those roly poly bugs that decompose the stuff in the soil making natural nutrients or nematodes which eat grubs), there should be lots of worms (to make tunnels for water to flow deep down encouraging deep root growth), there should be beneficialfungi (mycorrhiza - which grows in association with the roots of a plant in a symbiotic or mildly pathogenic relationship) and beneficial bacteria which when living in the right environment can and should reproduce very quickly and live close to the roots of plants/grass - Google "why is bacteria good for soil" for LOTS of great info!!
Some lawn care companies just think about NPK and pesticides... Hmmmm for more info please visit go to my home page and leave a note