Ten-pin bowling ramp in which a bowler will use two hands and push the ball down the ramp onto the lane. There are three widely recognized delivery styles used while the ball is released onto the lane. (See article: Bowling form.) These are the "stroker", "cranker" and "tweener" styles. Lesser used (and newer) styles include "no-thumb" and "two-handed". Strokers often keep their shoulders square to the foul line and their backswing generally does not go much above parallel to the ground. This type of delivery reduces the ball's rate of revolution, thus decreasing its hook potential and hitting power. Strokers rely on
Ten-pin bowling is standard WADA recommendation. They were due to be re-instated into the official bowling tournament community in early 2008, subject to WADA and BTBA review. This story was first reported on in Go Tenpin magazine. Pin characteristics, the bowling ball, and the lane surface are regulated by the USBC, BTBA and others. Technological changes throughout the history of the sport have often required new regulations. This continues today, often with great debate. The controversies usually involve "scoreability" related to greater strike carry on less-than-perfect shots. The increasing frequency and degree of higher scoring irks many bowling purists, who say that