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.
Therefore, the Baseball pitching distance is 53.5 feet and a ball has to go 86.8 mph to cover that distance in 0.42 seconds. The table to the right lists equivalent Baseball pitching speeds for corresponding Softball pitching speeds with the above assumptions.