You receive a present for Christmas that you didn't really like, and upon opening the packaging your face reacts and displays your true feelings about the gift. Which of the following principled is being demonstrated in this scenario?

Uhmmm I would say it was a shock face-?

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.