Another stretching motion you in a position is to square facing a wall corner and walk your fingers up the wall your past corner.
Massing the area directly with heated castor oil treatment also aids. https://www.Evernote.com/shard/s731/sh/4fd9133b-0afc-c54f-6c8c-b8cfd0b593fc/A2Xx37NMGsGrqfVQyPmp-g428NKibyT3hv0VJpJ9TplYY2vRQR4PrbOGnw