No offense, but your question sucks and makes no sense. Please be more specific, and there isn't any need to use big words. Flexion is a medical term which refers to the distance between any two bones/limbs and bringing them closer. I work in rehab and we barely even use the word flexion... I think what you are referring to are half reps? SO, are you asking what our opinions are on starting an exercise half flexed to fully flexed, or moving them from fully stretched to half flexed? If not then what... Maybe it's just me, but I don't even get what you're asking.
