This is a long overdue blog and patient resource video. I've been thinking about it off and on for several years every time I stare at strap grooves in my patients trapezium when I look at them from the back. Half the world is at risk of aggravating neck and shoulder pain by not wearing the appropriate bra, it should not be a mystery and I hope that the video will shed some light on the process.
https://www.youtube.com/watch?v=7tnr6cJu66I