Ruth t., an 88-year-old patient with osteoarthritis, arrives at the physician’s office complaining of ringing in her ears. the patient explains that she has been taking aspirin for her arthritis. the physician explains that she is suffering from an adverse effect of high-dose aspirin therapy.

People who utilizes the progression principle will ensure their exercise program increases in frequency, intensity, time, and type. the changes need to happen gradually in order to ensure they make gains in their fitness program. a person who doesn't utilize the progression principle can still gain health benefits from exercising, but will not continue to improve in cardiovascular fitness.