Muscles Used in the Backstroke. Even though you're swimming on your back, you use your abdominals in addition to the muscles of your back -- the latissimus dorsi and spinus erectors -- to support you as you flow through the water during the backstroke.
The average distance for a pitching wedge is 130 to 135 yards; for a sand wedge 115 to 120 yards; and for lob wedges 75 to 95 yards.
All Little League baseball players play on a smaller baseball field. The distance between the bases is shorter. The infield and outfield dimensions are smaller. The distance between the pitching rubber and home plate in little league baseball is also shorter. The official little league pitching distance is 46 feet. The pitching mound is also slightly shorter in height; it's raised by a gradual slope to an elevation of 6 inches above the level of home plate and the base paths. And the rubber or pitcher's plate is 4 inches depth by 18 inches wide.