The current body of clinical research work confirms the complex mechanisms that are in place between the respiratory system and the circulatory systems of the human body. This paper attempts to capture that information in a form that addresses the scope of the work and how it applies to the respiratory muscle training uniquely provided by PowerLung products.Twelve (12) sets of muscles are used in breathing. These muscle groups are used for both inhale and exhale. Principles of strength training in the literature show improved co-ordination and efficiency results by training both agonist and antagonist muscle groups. (Sale 1988) Like other sets of muscles, “the respiratory muscles can be trained for improvement in strength, endurance or both.” (Pardy, et al 1988).
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