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 ago the game wasn't tougher. You could hit the pocket as easily as you do now, but you couldn't knock over the same [number] of pins with a rubber bowling ball. Sport bowling is, for the first time, intentionally trying to make the lanes tough." Petraglia's suggestion to combat high-tech bowling balls is to use heavier pins that are single-voided on the bottom (versus double-voided), making them less top-heavy. Bowling alley proprietors and lane maintenance personnel have also argued that changes in ball technology have made it more difficult to lay out fair and credible conditions for participants. This is