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General fitness
In a more general meaning, physical fitness is a general state of good somatic health and abilities.
A handicapped person may nevertheless be physically fit. Fitness helps them to compensate disability.
Physical fitness is usually a result of regular physical activity, e.g., physical exercise, and proper nutrition.
Physical exercise
Physical exercise is activity performed in order to develop or maintain physical fitness. Exercises are generally grouped into three types depending on the overall effect they have on the human body:
- Flexibility exercises such as stretches improve the range of motion of muscles and joints.
- Aerobic exercises such as walking and running focus on increasing cardiovascular endurance.
- Anaerobic exercises such as weightlifting increase short-term muscle strength.
- Exercise can be an important part of physical therapy, weight loss or sports performance.
Exercise can be fun, but be sure to do what you like and eat enough calories, so when you do exercise you are building up muscles, not breaking them down for fuel. Carbohydrates are muscle-sparing; and if you don't get enough calories overall, you burn muscles up with the fat to make up the deficit.
Exercise benefits
Regular exercise has been shown to help ameliorate high blood pressure, obesity, heart disease, diabetes, insomnia, and depression, among others.
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