Water Aerobics is a very beneficial exercise program that offers multiple benefits for any fitness level. When in water, an individual is normally 90% lighter, on average. When you jump or run in the water, your body does not experience the same impact that these same moves would cause on land. This makes water aerobics an ideal activity for those with arthritis, back problems, foot or leg injuries, and knee conditions. Pregnant women and overweight individuals can also benefit from the reduced impact.