Begin on all fours. Back and abdominal wall is in a neutral position (not caved in anyway). Extend your leg, bent in a 90 degree angle, out to the side slowly (much like a dog would at a hydrant), extending up until your knee is in line with your torso. This is great for hips and abductor muscles, that often get challenged as we get older. Great for the butt and core as well. You may choose to use light ankle weights for this exercise, although, that is optional.