4. How does unhealthy lifestyle shorten one's life?

Consuming too much junk food and fast food can lead to lifestyle diseases like obesity and cancer which can reduce your lifespan by more than ten years. Instead of consuming fast food, eat a healthy diet packed with lots of fruits and vegetables, to live a long and healthy life.

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.