Physical exercising means moving the human body regularly and repeatedly to make it stronger and better at some physical activity. People do physical exercises as a part of their healthy lifestyle to get stronger and healthier or stay strong and healthy or to improve their body image. There are three basic modes of physical exercises:
- Flexibility exercises help the human body in general or its part in particular to be able to reach farther and bend better.
- Aerobic exercises help the body work hard for a long time.
- Anaerobic exercises, like lifting weights, make the arms and legs stronger.
Exercise can be fun, but it is important for the exercisor to do what he likes and eat enough calories, so when he exercises he is building up muscles, not just breaking them down for fuel. Carbohydrates are muscle-sparing; and if one does not get enough calories overall, there is the risk of burning muscles up with the fat to make up the deficit.
Benefits of exercise for all ages have been known since antiquity. Marcus Cicero, around 65 BC, stated: “It is exercise alone that supports the spirits, and keeps the mind in vigor.” 
Regular exercise has been shown to help high blood pressure, obesity, heart disease, diabetes, and depression, among others.