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.
Height is the same, but the most common throwing distance is 8 ft. If you ever play in Europe you will notice that there are softtip machines with boards sized like in steeltip. You will also find that the throwing distance sometimes is 7 ft 9 1/4 in here, and sometimes it is 8 ft...