An intense workout refers to a rigorous exercise routine that requires physical exertion, focus and energy. It typically involves high-impact movements or activities that challenge the body both physically and mentally. The goal is usually to push oneself beyond their normal limits in order to achieve better fitness results such as increased strength, endurance, flexibility, and overall conditioning. An intense workout can be done through various forms of exercise including weightlifting, high-intensity interval training (HIIT), plyometrics or other types of cardio exercises that require a lot of effort to complete.