I have several Serpa holsters.... one for glock

one for S&W, a couple for XD's....
the point is I have one on one Duty belt, the others I use as paddle style. if i don't wear a belt it doesn't move if your waist is tight. or I have gun belts for loose fitting jeans, BDU's.
I run every day with my XDm {full size -40}, no belt ( but with tight fitting waist) my holster might slide just a
wee bit forward after a mile or so, but it stays there.
very comfy after break in, not too difficult to conceal with larger apparel.
the only other holster i will probably get is a safariland for a duty holster.( other than a custom but that's another story)
practice, practice, practice,practice, practice, practice,practice, practice, practice,practice, practice, practice,.......................................