How are heart disease and type 2 diabetes similar? both diseases are communicable. both diseases can be prevented with vaccination. both diseases can be cured with surgery. both diseases are caused by an unhealthy diet.

Both diseases are caused by an unhealthy diet.

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.