Lung Function, Your Health, and the Benefits of Inversion Tablesin Spinal Issues tagged best inversion tables, best lung function, Human Lungs, inversion tables, inversion therapy, Lung Diseases, Lung Disorders, Lung Exercises, Lung function, Lung Function Test, Lung health, Lungs, total Lung Capacity / 0 Comment(s) The most crucial lung function is extracting fresh oxygen from the air and delivering it into the bloodstream.