It could, but I have found it wise to invest in a few dumb-bells to keep at home, so I can lift enough to maintain muscle. I used to have a rowing machine, barbells, and a weight bench at home, so I can get in a workout any time I like. I've found this is the best way to stay fit on my schedule, with no time wasted commuting to a gym -- although they have some great equipment.
You can usually pick up weights and benches, etc., at garage sales for cheap, after the owners decided they really weren't using them very much. It's a good investment in your health, however you find time to work out.