Long-distance running
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Long-distance running, or endurance running, is a form of continuous running over distances of at least 3 km (1.9 mi). Physiologically, it is largely aerobic in nature and requires stamina as well as mental strength.
A group of amateur runners in a long-distance race in Switzerland.
Burton Holmes' photograph entitled "1896: Three athletes in training for the marathon at the Olympic Games in Athens".
Paavo Nurmi, also known as the "Flying Finn", at the 1924 Summer Olympics in Paris; at the time, he won Olympic gold in the 5,000-meter long-distance running.
Men in the 10 km run section of the 2011 Grand Prix de Triathlon in Paris.
Exercise
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Exercise is physical activity that enhances or maintains fitness and overall health. It is performed for various reasons, including weight loss or maintenance, to aid growth and improve strength, develop muscles and the cardiovascular system, hone athletic skills, improve health, or simply for enjoyment. Many individuals choose to exercise outdoors where they can congregate in groups, socialize, and improve well-being as well as mental health.
Cycling is a popular form of exercise.
Weight training
Exercise affects many organs
Central (cardiovascular) and peripheral (skeletal muscle) adaptations to exercise training