Kendler further made his mark on the sport by utilizing his publication named ACE for promotional engagements. In the early stages of the 70s the fitness boom helped the game rise to higher levels. By 1974 there were around 3.1 million players who took the court for the racquetball experience. This resulted into the establishment of more clubs and courts. Whenever a player misses out on the first try a defensive serve comes into the picture. These serves do not aspire for flashy aces but emphasis is given on causing a weak return thereby giving the offensive player a higher chance to score. The common mark of defensive serves is the lobbing technique. Be sure to check if your goggles are properly recommended by the American Standard of Testing and Materials, and the Canadian Standards Association. Feet protection Racquetball is one game where you do a lot of running. It follows that you have to take care of your feet all throughout the game. Ankle sprains can sideline you for at least a week and disrupt your activities. Such accessories would be very helpful in playing the sport well. More and more fitness clubs are offering and facilitating racquetball. This is an acknowledgement to the fact that more sports aficionados are getting into the sport. There are now special courts for playing the ballgame and you could find them in many venues. There are also two sets of lines perpendicular to the short and service lines located within the service box. The first set of lines is parallel to the side wall with a distance marked by 18 inches. These lines along with the service line, side wall, and short line forms the doubles box wherein the doubles partner that is not in serving position stands during the actual serve. The best way to do a kill shot is hitting the ball a couple of inches off the floor straight to the front wall. Pass shot In racquetball, the pass shot is one very good defensive shot. The reason is simple: Anyone can execute it, whether you are a pro or a beginner. Hit the ball toward the front wall making it come as far away from your opponent as possible.