Lie on your back with knees bent and hands behind your head.
Lift your head and shoulders, bringing one elbow towards the opposite knee while lifting the opposite leg and arm and twisting.
Alternate sides.
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About this exercise : Bicycle Crunches with Arm and Leg Lift and Twist engage the obliques and rectus abdominis, enhancing core strength and flexibility. The arm and leg lift add an element of coordination and difficulty.