For the same 8km /mileage/, one (and only) long jog in a week is inferior to 2km repeated on four days, spaced out evenly.

Reason? momentum, resistance

— minimum threshold: about 4 laps i.e. one mile.
Once I cross this threshold, I almost always have spare energy to go on. If I run only 3 rounds and give up due to fatigue , then my “system” is not sufficiently heated up to a sustained energy level (similar to car engines).

The “system” is a complex interaction of physiological and psychological reactions to the stress of jogging. Similarly, the momentum and resistance are similarly complex.

— Hi Ashish,

Over the last few weeks, I have experienced a small but surprising drop in psychological resistance to jogging. When the thought came up to run for a few rounds in the stadium, I used to feel it’s just too hard, assuming such a crazy thought would come up at all. Now I feel I could do it. If I’m in a good mood and have the time, I would do it.

No doubt it will be hard to maintain, but nevertheless it’s a good sign. I would even say that it makes me feel younger even though the change will likely reverse 🙂