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.
Making the world better, one answer at a time. The most common fence distance in fastpitch softball is 200 ft. However, it can vary from around 190, to 220. There are fields where the corner outfield fences are closer, and the center field fence is further, and vice-versa. In slowpitch softball I believe the fence distance is 300 feet.