Breath-holding techniques involve methods to extend the duration one can hold their breath, often used in activities like free diving or swimming. These techniques can enhance lung capacity, improve oxygen efficiency, and increase overall endurance. Practicing breath-holding can also help individuals manage stress and anxiety by promoting relaxation. Common methods include the diaphragmatic breathing technique, where one breathes deeply using the diaphragm, and the box breathing method, which involves inhaling, holding, exhaling, and pausing for equal counts. Safety is crucial; individuals should practice in a controlled environment to avoid risks such as hypoxia or fainting.