Respiratory Muscle Training (RMT) is a form of exercise focused on strengthening the muscles involved in breathing, particularly the diaphragm and intercostal muscles (the muscles between the ribs). It's often used in respiratory rehabilitation and sports performance enhancement.

The training is designed to improve the inspiratory muscles' strength, endurance, and efficiency, leading to enhanced respiratory function. It's particularly beneficial for individuals with chronic obstructive pulmonary disease (COPD), long-covid, asthma, or other respiratory disorders and persons looking to improve their breathing efficiency and endurance during physical activity.