Painful condition caused by certain surgery, pregnancy or being overweight etc, see;
https://www.youtube.com/watch?v=Gg2LvDrE0BE
Vic & Carol
BE WHO YOU ARE AND SAY WHAT YOU FEEL .....
This is a good exercise to get relief from this condition, works for me;
https://www.youtube.com/watch?v=c56a0ZjuNsA