Garmin marathon watches are packed with essential features for serious runners. Thanks to their built-in GPS, they allow you to accurately track your route, distance and pace in real time. So you can stay in complete control of your run and adjust your pace to suit your goals. These watches also have a built-in heart rate monitor, so you can keep an eye on your heart rate during exercise. By knowing your heart rate, you can ensure you maintain the right intensity and optimise your endurance for optimum performance. The advanced data tracking function allows you to view detailed statistics on your training, such as total distance covered, calories burned and recovery times. You can analyse your training sessions, identify areas for improvement and adjust your training programme accordingly.