Pamela burns 1000 calories in 20 minutes. Pamela is an anaerobic exercise. The classification of anaerobic exercise comes from the classification of skeletal muscle metabolism during human exercise, and the concept of anaerobic exercise is also based on anaerobic metabolic energy supply system. For example, anaerobic exercise refers to the exercise of human muscles under anaerobic energy metabolism.

But what we think of as anaerobic exercise in our daily life refers to the high-speed and strenuous exercise of muscles in the state of "hypoxia". Anaerobic exercise is mostly exercise with high load intensity and strong immediacy, which is difficult to last and the time of fatigue elimination is slow.

Anaerobic exercise is relative to aerobic exercise. The metabolism of the body is accelerated during exercise, and the accelerated metabolism needs to consume more energy. The energy of human body comes from the catabolism of sugar, protein and fat. When there is not much exercise, such as jogging and dancing, the energy supply of the body mainly comes from the aerobic metabolism of sugar. The exercise that mainly depends on the aerobic metabolism of sugar is what we call aerobic exercise. When the sports we are engaged in are very intense or explosive, such as weightlifting, 100-meter sprint, wrestling and so on. At this time, the body needs a lot of energy instantly, but under normal circumstances, aerobic metabolism can't meet the needs of the body at this time, so sugar quickly produces a lot of energy through anaerobic metabolism. Exercise in this state is anaerobic exercise.