In training, results are driven by pushing beyond your limits. While you should never overdo it, you need to go further than you've been to get as far as you can go. You're not going to get there by doing the same thing at the same level continually, you must push for progress.
If you're looking for serious results, don't jog until you drop - sprint, stop and repeat. Jogging, like any kind of moderate exercise, will burn a moderate amount of calories, but will never produce serious results for fighting - because your body is unchallenged, the effects are diminished. Going at full speed in bursts, pushes the entire system and provides a workout that is something to grow on. This is true in all forms of exercise, not just running.