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<p>Since it has been possible to wear a heart rate monitor on your wrist, nearly everyone has been able to monitor and control their training load and intensity, for these small gadgets provide accurate biofeedback. Monitors have made rapid advances in recent years. As well as accurately measuring heart rate, they can now be used to run tests to determine individual training zones, fitness or stress levels. There are also many programs that are a...Seguir leyendo