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.
Measure and mark the proper distance of the pitching plate (rubber) from home plate. The pitching plate (rubber) is measured from the front edge and center of the pitching plate (rubber) to the APEX of home plate. The front edge of home plate is 17 inches in front of the apex. IN FRONT OF THE RUBBER ON A 90' FIELD.