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.
The difference from home to first in softball is 60 feet. It is the same distance between all the bases. In every level except 18U Gold and collegiate the pitching mound is 40â¦ feet away from home plate. In 18U Gold and collegiate the pitching mound is 43 feet away from home plate.