The significance of warming up before an intense workout cannot be overstated. Proper warm-up routines prepare the body for physical exertion by gradually increasing heart rate and blood flow to muscles, reducing the risk of injury. It also enhances flexibility and range of motion, allowing for improved performance during the workout. Additionally, a good warm-up can mentally prepare an athlete for the demands ahead, helping to focus and enhance readiness. Neglecting this essential step can lead to muscle strains and other injuries, underscoring its importance in training regimes.