What type of exercise is performed at a rapid pace and primarily uses oxygen to generate energy?

Aerobic exercise is characterized by activities performed at a rapid pace that primarily rely on oxygen to produce the energy needed for sustained physical exertion. During aerobic activities, the heart and lungs work together to supply oxygen to the muscles, allowing for longer durations of exercise without fatigue. Common examples include running, swimming, and cycling, where the emphasis is on endurance and stamina.

In contrast, anaerobic exercise, which does not primarily utilize oxygen for energy, involves short bursts of high-intensity activity, such as sprinting or heavy weightlifting. This type of exercise leads to lactic acid buildup and is not sustainable over long periods. Isometric exercises focus on holding a position without movement, targeting specific muscle groups without dynamic movement, while resistance training involves working against a force to build muscle strength, often through weights or resistance bands.

Thus, when identifying the type of exercise that operates at a rapid pace and predominantly uses oxygen for energy production, aerobic exercise is the definitive choice.