One of the lightweight knives I own clipped at 3 o-clock in waistband, comes in handy for opening things such as small packets of food when your tired. Or a wenger patriot in my pocket in my so called wallet which is nothing more than the cards with money wrapped around with a rubber band holding it all together, I toss the patriot in the rubber band as well. Thin, lightweight, and stays securely in the pocket thus far with that setup.
If I were into fixed blades and they were more legal in my area I probably be carrying a Buck Hartsook by somehow rigging it to my waistband. I think that be a pretty nice knife to have on long jogs in general as I think a small lightweight fixed blade be very lightweight and versatile, not to mention easy to clean if you decide to use it to cut up some food.