Yep. One of the 8 steady hold factors that were taught back in the day and it is still mentioned in current army training (FM 23-9 - Rifle Marksmanship).
When I instruct at the unit and to advanced rifle team members and SOTIC, that topic is front and center. Keep your blood oxygenated, hold while firing and breath between shots. The brain requires much of the O2 in your blood and a lack of it reduces your visual acuity, ability to concentrate and induces muscular tremors. None of these is conducive to good marksmanship.
A concurrent thread on shooter's physical conditioning touches on the subject too.
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Scharfschuetzer
US Army Distinguished Rifleman
Washington State Distinguished Rifleman
NRA Police Distinguished Expert
Last edited by Scharfschuetzer; February 28, 2012 at 10:00 PM.
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