In its most general meaning, physical fitness is a general state of good physical health. A physically handicapped person's body may be physically fit (healthy), though its ability is likely to be less than optimum.

Physical fitness is usually a result of regular physical activity and proper nutrition.

Physical fitness can be divided into different areas, including:
Flexibility
Cardio-respiratory endurance
Strength

The government Physical Activity Guidelines for Americans say to aim for at least 2 hours and 30 minutes of aerobic activity that requires moderate effort each week.