After mastering, say 5x15 reps of something, should you be able to do all the reps without any difficulty or effort whatsoever (i.e. no heavy breathing, muscle fatigue), or should you just be able to get through with the correct form cues for the exercise?
Also, is it normal to not be able to do, say 45 unbroken and clean reps of the exercise upon 5x15 mastery? Or is that not ok...
Just confused about mastery standards here in GB compared to other fitness
Thanks!