Moreover, in this very year the IRA took the spot of the NPRA in facilitating the national championships. Four years later Kendler was involved in an argument with the IRA board of directors which resulted into his formation of a pair of racquetball organizations. Nevertheless the IRA remained the game s top organization as mandated by the US Olympic Committee. The IRF or International Racquetball Federation facilitates the entirety of the World Racquetball Championships which initially took place in 1981 along with the very first World Games. Three years later players across the world again took the grand stage and since then the event has been done biennially specifically in August. Natural expansive arm movements (even simple grip movements) can cause pain and aggravate the injury. Follow your doctor s advice. Next, check with your racquetball expert for improper technique in racquet handling. Is your grip wrong? What about the size and type of your racquet? Shoulder protection Shoulder injury is caused by using the shoulders and not correctly using the side of the body in swinging your racquet. The ball gathers enough spin as it hits the three walls. Done correctly, the ball rolls alongside the back wall which makes it difficult for your opponent to return. Around the world Another defensive shot can be executed in times when you are out of position. This should be done with enough force. Hit the ball hard enough into a side wall with enough momentum to rebound on the front wall and still have enough energy to hit the other side wall as high as possible. The 5-foot area surrounded by the receiving line and the back edges of the short line which is only available during service is termed as the safety zone. Now let s move on to error tags. Stepping over the service lines during service is not allowed and is termed as foot fault. If the ball bounces in front of or on the second solid line of the service area the player commits a short serve. More rules The server has to stay in the service area when serving, stepping on a line but not pass the line. The server can pass the short line once the serve (ball) passes that line. There should be a continuous motion throughout the serve while the receiver allows just one ball bounce, and hitting it before the second bounce.