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.
Distance from home plate to the pitcherâs mound: 43 feet. Distance from first base to third base (across the diamond): 84 feet, 10Â¼ inches. Distance from home plate to second base (across the diamond): 84 feet, 10Â¼ inches. Distance from home plate to the backstop (not mandatory): 25 to 30 feet.