Ten-pin bowling the body in step one; step two has the ball at the bottom of the backswing; in step three, the ball is at the top of the backswing; finally, the ball is swung forward and delivered in conjunction with the fourth and final slide-step. In a five-step approach, the bowler takes an initial timing step before pushing the ball away from the body. The regulations listed here are generally based around regulations set by the United States Bowling Congress — based on the original rules first codified by a USBC predecessor, the American Bowling Congress in 1895 — and the
Ten-pin bowling determining success in the sport of bowling." The USBC completed data analysis and released a lengthy report on its website (www.bowl.com) to the public in the spring of 2008. As of April 1, 2009, The USBC now regulates the chemical surface roughness of all bowling balls manufactured for certified ten-pin bowling. This specification is a direct result from the ball motion study, as the surface roughness of the coverstock of a bowling ball was the number one variable (out of 18) that affected the strength (how much a ball hooks) of a bowling ball. The radius of gyration specification has