All three if used regularly would be just fine but I would consider the elliptical the best with the lowest impact on knees and hips and in the long run that is the better option. Plus the elliptical gives a bit of an upper body workout as well.
Jogging outside.When you are moving over uneven terrain,you use more muscles.
Machines do some of the work for you and are boring compared to the change of scenery that jogging provides.BTW,I use a treadmill when I am not outside. ;) Guess where I would rather be
I prefer low impact workouts, jogging is too hard on my knees so I cycle a lot or rather will be now all the snow has gone…. I’ve been using a stepper over the holidays to try to keep me going & I’m still using the free weights too & the punch bag to get the blood moving & sweat pouring….. I have a rower too & do a lot of floor exercises, push ups, sit ups etc… :-/