This book constitutes the English version, with changes and additions, of the academic course headed "Kinetoterapia afec_iunilor respiratorii", Publishing House of "Alexandru Ioan Cuza" University, Iasi, Romania, (in press), author being Bogdan-Alexandru Hagiu. It is addressed to kinetotherapists. The work contains notions about respiratory diseases and their possible treatments. A special emphasis is placed on ventilatory dysfunction treatment by physical therapy.