Important factors in determining the credibility of a health product manufacturer include a. recalls, location, and doctor's recommendation b. location, clinical trials, and quality control c. recalls, location, and quality control d. clinical trials, doctor's recommendation, and quality control select the best answer from the choices provided. a b c d

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.