Share 'Tennis Elbow - Revisited'

Are there any hard facts what causes tennis elbow? Many players in my TVTA group and some of my YLT coaches have been dealing with pain this year. One developed it after playing with poly strings. I've heard all sorts or reasons what causes tennis elbow: racquets being too light or heavy, too stiff, tights string tension, or string material, poor physical condition, over use of arm, repetitive st…