Children and adults can both benefit from having a dietician.

All people with insufficient knowledge about how the body processes food should seek knowledge about foods that will nourish the body versus a diet that consists of a heavy amount of fast food or pre-made dinners. With proper planning, a diet that is rich in vitamins and minerals but lacking excessive fat and sugar-filled content can help with weight loss, energy levels, and overall better health, and a dietician can help people with little knowledge to create such a plan.

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.