Fitness refers to the state of being physically fit and healthy. It encompasses various physical activities, such as exercise, sports, and other forms of physical activity, that promote and maintain overall health and well-being. Fitness is not just about physical strength and endurance, but also about mental and emotional well-being.

It involves developing a healthy lifestyle that includes regular exercise, healthy eating habits, and stress management. A fit person has higher energy levels, better sleep quality, improved mental clarity, and a lower risk of developing chronic diseases such as obesity, diabetes, and heart disease.