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.
Best Answer: According to ASA rules, the distance from the mound to the plate is 40 feet. The distance is usually 35 ft. from catcher to pitcher in that age group. Sometimes, though, at away fields it is around 30 or as high as 40.