Elliptical Trainers: Different Types? 

Thank you! Brief but usefull.

I have a home Elliptical machine, The resistance is mechanical, and there is no adjustment to the position, and I use it. Do you think it has no benefit or effect?

I hear these things wreck your knees

Amazing video. Thanks a lot! Btw which will target more glutes... front drive or rear drive?

isn't bad for the knees that the feet are not "running" straight, but inclined to the sides like if you were skying instead running? Same question for the arms, that are opened in diagonal and not parallel to the body as in a run?

How much time per day is good sir ???