My understanding of Perfect = 99.99999999999999999999999% perhaps 100% absolute precision, absolute zero room of improvement
As a human being
Or even most advance machine
I still doubt we're far far away from achieving Perfect

Body weight > improve form > add weight > improve form, rest in between

This post has been edited by helven: Feb 18 2020, 12:01 PM

Then of course proper form/good form loh, and effective weight.
For example, if it is a biceps curl, pick a weight that let you do the biceps curl ONLY, not full body swing curl that you start engaging other muscle group. The name is already saying it is a biceps curl mah