Posted: Yesterday at 21:44
A motorised treadmill does some of the work, there's no weather conditions or air resistance to deal with, and you run in a different way to how you would naturally on the road.
Take your point about mental resistance, but trust me, there's enough need for discipline in running as it is, without adding more strain to the mix!
Generally though, a nice training plan long term is a long run, some reps of short distance followed by recoveries, and a continuous "tempo" run. Then slotting as much easy running in as you can handle.
Gradual build up, create a base fitness, then slowly add in the quality work.
To a point, the more mileage the better. Simple as.