I know this is NOT occult at all but falls under "body"

I have started a martial arts training program for myself

stretch
pushup/crunch
form (Techniques and such)
run/jog

I usually skip the "Form" part since i am tired by that point because i lack endurance

I jog to work up endurance, however i am never able to do so for longer than one minute.

I pick my feet up halfway to, or up to, my knee.
I have a straight back.
My feet are flat
(I have been told) my feet tend to go off to the side a little.
(I dont know why) I have been compared to a running duck
I get tired quickly.
I have never been too good at running, long OR short distances.

Maybe it's running form?

I have been told it's best to keep a straight back, but my friend runs like lightning and his back is always slanted foreward when he sprints.
I have also been told to land on the middle of the foot, but that doesn't really help at all.

so i'm wondering, WHAT IS PROPER RUNNING FORM? (short and long distance)