Some years ago I was instructed by "professionals" of the bodybuilding world. But they had so many "mis-information" that entirely stopped all my progress. I am not mad because I found soon enough that something was not right. But I have heard so many bad information that I decided to list a few :
-You need to sweat a lot, that´s how you burn fat.
-If you do 20 reps per set, you will get muscle definition, there is no other way.
-Train everyday as much as you can. Overtraining ? That doesn´t exist.
Like I said that´s what I can remember now.
Do you remember more ?