The short-term effects of a high-intensity workout can be quite dynamic, including increased heart rate, enhanced metabolism, and higher energy expenditure. During such workouts, the body undergoes anaerobic metabolism, leading to the rapid breakdown of glucose for energy. This process can result in an immediate afterburn effect (excess post-exercise oxygen consumption, or EPOC), which helps burn additional calories post-exercise. Furthermore, high-intensity workouts can improve muscle strength, increase cardiovascular endurance, and release endorphins, contributing to improved mood. Overall, these effects are beneficial for both physical and mental well-being.