13. explain why it is important for health care professionals to stay informed about new development

If there is a new disease or virus of some sort, they would need to keep aware of how to fix them. For example if there was an amazing cure for cancer doctors would have to know and treat their patients.

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.