Which type of exercise involves short bursts of activity that do not use oxygen for energy?

The correct answer is anaerobic exercise, which refers to types of physical activity that occur in short bursts and do not rely on oxygen for energy production. During anaerobic exercise, the body primarily uses stored energy sources, such as glucose, to fuel rapid and intense activities. This type of exercise is characterized by high intensity and typically lasts from a few seconds up to a couple of minutes.

Anaerobic exercises include activities such as sprinting, weightlifting, and high-intensity interval training (HIIT). These exercises lead to quick accumulation of energy and are essential for building muscle and improving strength. Since they do not depend on aerobic pathways, anaerobic exercises are particularly effective for enhancing power and speed.

The other options reflect different exercise categories. Aerobic exercise involves longer-duration activities that require oxygen for energy, typically at lower intensities, and is essential for improving cardiovascular endurance. Isometric exercise, on the other hand, involves static muscle contractions without movement, which can also increase strength but doesn’t fit the specific criteria of high-intensity bursts. Strength training generally includes both anaerobic and aerobic forms but focuses more on building muscle through various forms of resistance, primarily using anaerobic processes.