I have some doubts about how the trapezius is involved in barbell row. I'm a newbie in weight-lifting so I'm sorry if I won't be very accurate.
What I mean with shrug
I mean when your trapezius shortens to bring your shoulders near your ears.
When I do barbell row, I shrug a little. I wanted to know if it is correct, or if it's a bad compensation I should try to avoid.
Let's consider for instance a pull-up. From the following picture, It seems to me that you have to shrug in the starting position and you have to keep a depressed trapezius in the final one.
Does the trapezius follow the same movement pattern also in a barbell row shown in the following picture?
It seems to me that in this case the trapezius doesn't shortens/lengthens vertically (up-down), but laterally. So, I'd say it works laterally and it doesn't cause your shoulders to shrug.
Is my analysis correct? If it is, I'd say it's a mistake to shrug during barbell row.