The wave

Start by lying on your back, with your knees bent, and your hands on your knees.

As you exhale, gently bring your upper thighs toward your lower abdomen.

As you inhale, let your feet drop toward the floor, arching your lower back. 

Keep your hips on the floor for the entire exercise, and allow your hands to remain on your knees as you move back and forth. 

The movement of your legs and abdominal muscles mimics the piston effect of natural breathing, which is different from the way most people with asthma breathe. 

Barbara stresses that the movements need not be large, though they may expand as you settle into the exercise.