Warm-up exercises before high-intensity workouts are vital for several reasons. They gradually increase heart rate and blood flow to muscles, preparing the body for more strenuous activity. This can lead to improved flexibility and reduced risk of injuries by enhancing muscle elasticity. Warming up also helps in mentally preparing the individual for the workout, promoting focus and reducing anxiety. Ultimately, a proper warm-up can enhance performance and contribute to more effective and safer high-intensity training sessions.