ANTA Member Article Summer 2023
Isaac Enbom
ANTA Remedial Therapy Branch Chair Diploma of Remedial Massage Advanced Diploma of Myotherapy
Exploring Thoracic Mobility and Breathing Biomechanics Introduction:
Thoracic mobility, the ability of the ribcage to move and expand plays a pivotal role in the mechanics of breathing. The thorax serves as the protective housing for vital organs while accommodating the intricate interplay between the respiratory and musculoskeletal systems. In this article, we delve into the profound relationship between thoracic mobility and breathing biomechanics, highlighting its significance for Natural Therapists. Breathing biomechanics refer to the physiological and mechanical processes involved in the act of breathing, which is essential for providing oxygen to the body’s cells and removing carbon dioxide. Breathing involves the coordination of multiple anatomical structures and muscles, and understanding the biomechanics is crucial in order to identify dysfunctional breathing patterns and to develop specific treatment interventions.
Breathing involves two main phases: inhalation (inspiration) and exhalation (expiration). Inhalation (Inspiration): During inhalation, the diaphragm and external intercostal muscles contract. The diaphragm moves downward, increasing the volume of the thoracic cavity. The external intercostal muscles between the ribs also contract, lifting the ribcage upward and outward. These actions collectively expand the thoracic cavity, causing a decrease in intra-thoracic pressure. This decrease in pressure relative to the atmospheric pressure causes air to rush into the lungs. Exhalation (Expiration): Exhalation can be passive or active. In passive exhalation, the diaphragm and intercostal muscles relax, and the elastic recoil of the lung tissue, along with the relaxation of the ribcage, decreases the volume of the thoracic cavity. This results in an increase in intra-thoracic pressure, causing air to flow out of the lungs. In active exhalation, such as during exercise, the internal
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