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красиво... Очень важно.. .Athletic heart monitors have existed for several years now, but it wasn't until relatively recently that the technology behind them, and the development of heart monitor training techniques came together to make training with a monitor both simple and effective for the average runner. While many runners own heart monitors, often they may not be using the devices to their full potential. Other runners do not own a heart monitor and are unaware of the benefits of training with one. Why Use a Heart Rate Monitor? Heart monitors are devices that are designed for wear during strenuous exercise, and serve the purpose of measuring and recording your heart rate, while giving you instant feedback about the work level of your heart. The fitness of the heart is the key to one's aerobic endurance - sometimes called 'cardiovascular respiratory endurance'. Both for health and racing reasons, aerobic endurance is a point of focus for almost any runner. Heart monitors are one of the most effective aids for tracking and developing your progress on the path to increased aerobic endurance.