Ab Bicycles Alternating Knees To Elbows. Lower to the starting position and repeat with your left arm and right leg. At the same time extend your left leg out behind you parallel to the floor.
Bend elbows and place hands behind your earlobes. Alternating arm and leg lifts. Lie flat on your back and place your hands behind your head.
The plank works the centerline of your stomach obliques and waistline.
Reverse to drop back into a forearm plank position. Find out how many calories you burn for elbow to knee crunch. Learn how to do the plank knee to elbow exercise in this free fitness video from a p. Ab bike alternating jackknife.