I am up to 21 minutes a day on the elliptical and very discouraged that I have not lost weight. (I also swim and walk). I eat healthy, no junk food, and don't even eat dinner, just a light snack at 4PM. I am convinced as you get older it is MUCH harder to lose weight. 20 years ago I could lose a few pounds just like that. Now, nothing I do seems to make a difference.