I've heard a lot of different things about it...and I just want a clear answer for it. I think it's rolling your shoulder back at the top of the movement? And is there a purpose for it for strength training, or is it only a part of competitions used to determine that the movement was completed? So would there be any strength benefits by locking out or no? Cause I don't really know if I have been locking out or not...

Thanks in advance