It's relative to your strength, I think. If someone can only do 8 pushups, that's a pretty high intensity for that person to do 3 sets of 8 or something, so I'd imagine there would still be some MTR going on. Edit: I should note that I'm using "intensity" to mean a weight relative to someone's max. So if I can squat 500, 450 is high intensity, but 250 is not. Same with the example above. If someone can only do 8 pushups, clearly they're moving a lot of weight for their current capabilities.