What is a main purpose of feedlots? To maximize weight gain
To protect the animals from predators,
To prevent animals from overeating
To collect data on each individual animal,

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.