I consider it a success that I just DO something. Like walking, free weights, stretching, swimming, or dancing which I do almost every day anyway. I also count almost anything that requires movement as exercise.
Like if I walk the length of 2 parking lots twice at 2 different stores, I count that as something. Not much of a something, but I count it. If I count reps, I tend to shut down entirely. So with weights or stretching for example I'd put on a couple or more songs and use those. It's not the reps, it's the music that motivates me. It's weird because I thought you were far more artsy than I am. You know, because we creative types tend to be um...undisciplined. (My studio is NOT a mess right now! I lie through my teeth.) Maybe your affinity for math is why you go by the numbers.
And that friends, is my current observation/blathering on the psychology of approaches to exercise and fitness.
I saw 2 on AMZ one had a 5 degree incline and the other a 10 degree incline. They weigh less than 60 pounds! I'm gonna try to search up something better than the one's on AMZ.