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.
How do you measure the pitching distance for high school softball? The pitching distance is 40 feet from home plate to the back of the pitching rubber. For 18U Gold and collegiate softball the pitchers mound is 43 feet away. This is because pâ¦itchers throwing at these levels throw much faster than those at the lower levels, making it a lot harder for batters to identify pitches.