I just saw your guys videos on delt cable y-raise where the bench is vertical and you perform y-raise, and then a very similar movement but on a flat bench doing the lateral raise. Is there a big difference? Which is better?
Also how important is it to work all your muscles in the “shortened and lengthened” positions. For example, I hear that you should do y-raises (shortened position) as well as standard cable lateral raises (lengthened position) for side-delts. Does this mean if I only chose one my shoulders wouldn’t grow?
Does this also apply to other muscles like chest and triceps (meaning do I need to train them from a stretched position like a flye or overhead extension to grow)?