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.
Fastpitch softball distance between pitching rubber to home plate age 9 yrs 10yrs girls? generally it is 40 feet, at least for jr high, high school   ages under 10 yrs of age are 35 ft, 11-14 is 40 ft and high school is 43 ft. 18 people found this useful.