Exercise & Fitness complement each other. Physical exercise is any bodily activity that enhances or maintains physical fitness and overall health and wellness. It is performed for various reasons including strengthening muscles and the cardiovascular system, honing athletic skills, weight loss or maintenance, as well as for the purpose of enjoyment. Frequent and regular physical exercise boosts the immune system, and helps prevent the "diseases of affluence" such as heart disease, cardiovascular disease, Type 2 diabetes and obesity. It also improves mental health, helps prevent depression, helps to promote or maintain positive self esteem, and can even augment an individual's sex appeal or body image, which is also found to be linked with higher levels of self esteem. Childhood obesity is a growing global concern and physical exercise may help decrease the effects of childhood obesity in developed countries. Health care providers often call exercise the "miracle" or "wonder" drug - eluding to the wide variety of proven benefits that it provides.

Physical exercises are generally grouped into three types, depending on the overall effect they have on the human body:

• Flexibility exercises
  stretching, improve the range of motion of muscles and joints
• Aerobic exercises
  cycling, swimming, walking, skipping rope, rowing, running, hiking or playing tennis, focus on increasing cardiovascular endurance
• Anaerobic exercises
  weight training, functional training, eccentric training or sprinting, increase short-term muscle strength