Not a lot. Depends if we are talking about physically preventing you from swinging properly, messing with your balance etc., or if we include the mental aspect of it. Just knowing that your pants are waving like flags can make you do funny things while swinging. The mental aspect is especially important if you aren't hitting it too well. When I'm and hooking, just a small wind can be terrible. If I'm hitting it well, the wind doesn't affect the ballflight as much and consequently makes me play with more confidence. Playing with the wind rather than constantly fear it.
Hero was petty positive in my opinion. It will be interesting to see if something has changed since then. Being a full field and more of a standard tour stop, he could feel more pressure (self-inflicted) to play well. I think he'll make the cut, but not be over 25th by the end.
I like to use the Pelz Putting Tutor for a few minutes- sort of a gate practice for the ball (2 ball bearings on either side, with the option of various widths). But usually, that's not right before a round. That's when practicing during the week or at home. Before a round, it's a few minutes on the putting green and go - my weekend group is one of the first off the tee in the mornings.
Try to do what I'm doing in that video with the shaft across my chest.
Turn the right pocket back & around and "stretch" the left lat down & across.
Also take the arch out of the lower back, forgot to mention that before, it'll help the pivot.