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.
It all depends on the age of the girls playing. Usually, girls 10 and under pitch from 35 feet. Girls under 16 typically throw from 40 feet. What used to be just college and hâ¦igh-level travel ball is now coming to 16 year olds - 43 foot pitching distance.