The relevance of a warm-up before exercising lies in its ability to prepare the body for physical activity. A proper warm-up increases blood flow to muscles, raising their temperature and enhancing flexibility. This can reduce the risk of injuries and improve performance by enhancing muscle coordination and readiness. Warm-up routines often include dynamic stretching and low-intensity movements, gradually increasing intensity to match the workout. Incorporating a warm-up allows individuals to transition smoothly into more strenuous activities, ensuring they're physically and mentally prepared.