Abstract
The purpose of this review article is to identify exercise prescription components (EPCs) used and results obtained during previous respiratory muscle training studies. The need for further scientific inquiry pertaining to this topic is discussed. Respiratory skeletal muscles have proven responsive to basic training principles for improving strength and/or endurance in persons having normal health, cystic fibrosis, chronic obstructive pulmonary disease, and quadriplegia, and in persons being weaned from ventilators. The ingredients for successful training are unclear because of interstudy variations in the EPCs of frequency, intensity, and duration of a training session; level of subject supervision; training mode; length of training period; and in the initial level of fitness, the age, the gender, and the disease states of the persons to be trained. A self-selected breathing rate was a common factor in all studies cited. By the selective manipulation of each EPC in a series of future, controlled investigations, the guidelines for safe, reproducible, affordable, tolerable, and effective respiratory muscle training prescriptions could be generated. (Respir Care 1985;30:34-42.)
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