Por un escritor de hombre misterioso
Training night and day isn't the answer. Your body needs time to recover from intense workouts. The Polar Vantage V Multi-Sport Training Watch uses the latest wearable technologies to monitor different aspects of your performance, including your heart rate, running power, swimming style, body strain and sleep quality—all from a single wrist-based device. There's no need for a chest strap or foot sensors.
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