What does it mean to be an informed consumer?

Someone who studies a product before purchasing it, in other words when you see a fast weight loss program/product on tv you should take a moment and consider that product. 

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.