Personally I find intervals / speedwork reps on treadmills easier than when run outside, say in a park, or track. Pace is easier to monitor, and conditions are not variable.
Do they have the same positive impact? Or are they a "cheat" training mode? Hmmm!
Whats' your say?
Yes they are easier, and you dont work as hard.
1% incline on the treadmill and they are more or less the same.
At the end of the day, you can overthink these things. Does it make it easier? Yes ...... but so what, just do it longer or faster than you would do outside.
If you come out of the gym, gasping for air, yelling 'Im dying!' ..... then your body doesnt care whether you were on a belt or on solid ground for the previous hour.
People can be a bit prissy about treadmills, but the bottom line is,the human body is a pretty simple machine, and it doesnt sit there and go 'Oh well, I see they did all this on a treadmill so Im going to reduce my improvement by 10% as a penalty.'
If you bust a gut at the gym, thats all that matters.
and its more boring. . .
doesnt the fact that the 'ground' is effectively moving under you assist leg turnover?
Guess its a bit like marmite then?
haha! or unless you're this guy
(from our local parkrun)
They are easier because you're not getting any air resistance. So either stick it on 1% or add a bit of speed - I add 0.5 kph, which is roughly equivalent. But as also-ran/DF3 say, if you are in the right effort/HR zone, that is what actually counts.
Certainly not cheating.
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