I hope this doesn't sound like chastising, because that's not what it is meant to be..

When you were growing up, did your parents ever give you the dinner table line "You better eat that up. There are poor starving children in *name the country of your choice* that would want that in a second"?

Well..good gosh Alice..you have a gym that most of us would die for!!! Some of us have nothing..I myself made dumb bells out of containers filled with nuts and bolts and nails and sand.
I was a couch potato too. One day I just started, and I haven't looked back since.

Just go down there an use that wonderful stuff. Even if it's only for 5 minutes a day. At some point all of a sudden you will find yourself loving the feeling of having sweat pour off your forehead. Give it a try. You might surprise yourself!!!!