Which term best describes exercises that do not use oxygen to produce energy?

The term that best describes exercises that do not use oxygen to produce energy is anaerobic. Anaerobic exercise refers to high-intensity activities that are performed in short bursts, during which the body relies on energy sources stored in the muscles, rather than using oxygen from breathing. This type of exercise is essential for building strength, speed, and power. Examples include weightlifting, sprinting, and high-intensity interval training (HIIT), where the body quickly depletes its glycogen stores for immediate energy without the need for oxygen. Understanding anaerobic exercise is crucial for athletes and fitness enthusiasts who want to improve performance and physical capacity in short-duration, high-intensity scenarios.