If you want to lose, oh, six or seven pounds in about two hours I know one way to do it. Try transplanting a bunch of monkey grass from one side of your property to the other in 94 degree heat on July 4 in an effort to beat the predicted thunderstorms. If you sweat like a Lowder, which means you have to be the kind of person who breaks into a sweat when you walk a block in 65 degree weather you might even lose 10 pounds.
The bad news is you put a bunch of pounds right back on when you suck down four beers to celebrate your accomplishment. Not that there's anything wrong with that.