And take note of how the real pros do it. The biathlon event in the Winter Olympics combines cross-country skiing and target shooting with a 22-caliber rifle. Churning his legs and arms to get swiftly across rugged alpine terrain, a biathlete’s heart rate hits two hundred beats per minute. Then he must stop, un-sling his rifle, and bring his heart rate down enough to steady his hands and mind to take aim at a target fifty meters away. A top biathlete can lower his heart rate to 140 beats per minute in just twenty seconds in order to be calm and steady enough to aim accurately. How? By training
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