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.
A pitching wedge is the lowest-lofted of the named wedges, used to hit a variety of short-range shots. The modern pitching wedge has a loft of around 48Â° (exact lofts vary by clubmaker and player preference) and little or no bounce (angle of the sole to the ground).