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.
Home to front of pitching rubber â In high school and college softball, the distance from home plate to the front of the pitching rubber in the middle of the pitcherâs mound is 43 feet exactly. The pitching rubber itself is a white slab that is 24 inches long by 6 inches wide.