Techniques that can help improve breathing during physical exertion include diaphragmatic breathing and pursed-lip breathing. Diaphragmatic breathing encourages deeper breaths using the diaphragm, enhancing oxygen intake and reducing breathlessness. Pursed-lip breathing helps control breathing pace and keeps airways open longer, which can aid in endurance activities. Additionally, practicing good posture and relaxation techniques can optimize lung function and efficiency during exercise. These methods not only improve performance but can also enhance overall respiratory health.