Which type of activity is characterized by the absence of oxygen?

Anaerobic activity is characterized by the absence of oxygen. This type of activity takes place during short bursts of intense exercise where the body's demand for oxygen exceeds the oxygen supply available. During anaerobic exercise, the body primarily relies on energy sources stored in the muscles, such as glycogen, to fuel performance. This leads to the production of energy without the need for oxygen, which is why activities such as sprinting, heavy weightlifting, and high-intensity interval training fall under this category.

Conversely, aerobic activity relies on oxygen to generate energy and involves prolonged, lower-intensity exercise, which differentiates it from anaerobic activity. Dynamic stretching and yoga are focused more on flexibility, balance, and breathing rather than on the energy systems utilized in various forms of physical exertion.