treadmill or elliptical trainer

Claremoak

I have only ued an elliptcial. It is easy on my bad knees. When i started i could hardly do 1 mile on the easiest setting, my legs felt like jelly! Mine has multipe programs, intensity levels and inclines that I have barely gotten a start on and I do not have any type of routine, This morning I did 6 miles in 35 minutes an a second level program, burned 644 caories according to my fitbit, (524 according to the elliptical). Everyone's different. This works for me for now.