Expand-A-Lung Breathing Fitness Exerciser 4 +1 Free Promotion by Expand-A-Lung at Muscle Pain Relief Rubs. MPN: EAL4+1. Hurry! Limited time offer. Offer valid only while supplies last. THE FLOW OF AIR IN AND OUT OF THE ALVEOLI IS CALLED VENTILATION AND HAS TWO STAGES: iNSPIRATION (FOR INHALATION) AND EXPIRATION (FOR EXHALATION). TO ACCOMPLISH THIS, THE WHOLE THORAX MOVES AND AND CHANGES SIZE, DUE TO THE ACTION OF TWO SETS OF MUSCLES: THE INTERCOSTAL MUSCLES AND THE DIAPHRAGM. THESE ARE THE MUSCLES THAT ARE STRENGTHENED BY USING THE EXPAND-A-LUNG BREATHING FITNESS EXERCISER. IN ESSENCE, YOU INHALE MORE OXYGEN, AND EXHALE MORE CARBON DIOXIDE. THE RESULT IS A SUBSTANTIAL
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