DOES TREADMILL RUNNING ACTUALLY COUNT
It counts fully. A treadmill run builds the same fitness as a road run when the effort is the same. The only catch is that a moving belt makes the run slightly easier than the road, so you put a little bit back. Set a 1% incline, run by effort rather than the number on the display, and give every session a job. Do those three things and your indoor kilometres carry straight over to race day.
WHY THE TREADMILL GETS A BAD NAME
There are two reasons, and neither of them has anything to do with fitness. The first is the belt. It moves under your foot, so you do less of the work of pulling yourself forward. The difference is small, but it is real, and it is why the same pace feels easier indoors. The second is that there is no wind, no hills, no corners and nothing to look at. Your effort stays flat for the whole run, and flat is boring. Boring is not the same as useless, but it does make runners quit halfway and then decide the treadmill does not work. Neither problem decides whether the run counts, and both are fixable in about ten seconds.
SET UP YOUR TREADMILL WITH THREE DECISIONS
First, incline. Put it on 1 to 2% and leave it there. That is the setting that makes a treadmill run feel like the road. Not 15%, not a hill workout, just 1 or 2% as your default. Second, pace. Your treadmill pace will look faster than your outdoor pace for the same effort, and that is normal. Do not chase the number. Pick the effort you want from the session, set a speed that gives you that effort, and let the display say whatever it says.
Third, the job. Every treadmill run needs one. On an easy day, go easy and let it be dull. For a tempo, set the speed and hold it. The treadmill does this better than the road because it will not let you drift. For intervals, use the speed button and let the belt do the pacing. Outside, holding an exact pace is a skill. Indoors, it is a button. When the pace matters, the treadmill is the better tool, not the worse one.
YOUR NEXT TREADMILL RUN, STEP BY STEP
The mistake everyone makes is boredom, not biomechanics. You get on with no plan, run at whatever speed the last person left it on, stare at the numbers, and twenty minutes in you have had enough. Then the run gets written off as wasted. A treadmill run with no job is the same as a road run with no job. It just feels worse because there is nothing to look at.
So here is your next one. Set the incline to 1% before you start. Decide the job out loud: easy, tempo or intervals. Point a fan at yourself. Run by breathing for the first ten minutes, and only then look at the display to see what speed that effort turned out to be. Then do your planned workout. That is your treadmill conversion, and you have it for every session after this one. If you want your own training looked at properly, start with personalised coaching at Run The Race.