Physical endurance refers to the ability of the body to sustain prolonged physical activity. It involves the efficient functioning of the cardiovascular system, muscles, and energy systems. Activities that improve endurance include running, cycling, and swimming, which help increase stamina and overall fitness. Training for physical endurance often includes aerobic exercises, which enhance the body's capacity to use oxygen effectively. This type of training can lead to improved performance in sports and daily activities. Factors such as age, genetics, and nutrition also play a role in an individual's endurance levels.