Sheepdog Tip of the Day, Before Combat tip 284
Of all the complimentary physical skills that marksmen require, the one that contributes the most to the subconscious skills is aerobic fitness. Aerobic fitness is all about being able to deliver oxygen to the blood, and oxygen to the blood results in clear vision, clear thinking, and controlled performance. The marksman must learn to apply the breathing techniques that will support his shooting performance: respiratory pause, "gulp of air," forced breathing, and combat (or four-square) breathing.
Linda K. Miller and Keith Cunningham, Secrets of Mental Marksmanship
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