Try the interval program on the elliptical trainer. For 5 months I used the elliptical regularly in the 1 to 3 resistance level. I didn't think I could do more. Then I tried the interval program. I not only could I do it, but I burned far more calories than in the weight loss mode.
The interval program I use goes from level 3 to level 7 resistance. I use a stride of 26.