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.
(Professionals now also use similar designs, preserving the gap in hitting distance between the amateur golfer and the pro.) As a result the loft of the pitching wedge decreased along with the numbered irons from a traditional loft of between 48â54Â° to between 45â50Â°, similar to that of an older 8-iron.