Instinctively snatching his helmet off his head and putting it over a live grenade.
One company, Xenith, has a partnership with a youth football league that is testing a helmet that the company claims is designed to reduce head movement within the helmet, thus reducing concussion risks.
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Michelle Askam, from Leeds, said nine-month old Molly had plagiocephaly and spent six months wearing a helmet to correct her head shape.
It can handle multiple hits in one accident, Haupt says, and covers more of the head than a standard helmet.
It can also handle multiple hits in one accident, she says, and it covers a much larger area of the head than a standard helmet.
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The latest version announced at the Consumer Electronics Show 2013 weighed 4.5 ounces and could be worn straight over the head or on a helmet.
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In order to train for her job as a test driver for the Formula One team Marussia, Maria de Villota puts on a weighted helmet and does a couple hundred head rolls.
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In studies with soccer balls, there was little difference with or without headgear, and in the case of one type of headgear, there was evidence the force on the head was greater when a helmet was worn than when not, according to the data.
The comparison between the gridiron and a war zone becomes even more similar now, as the NFL is looking into implementing the same helmet sensors the Army uses to gather data on head trauma after impact, according to the Stars and Stripes, an independent news source of the military.
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You can't duck your head and deliver a forcible blow with your helmet.
First, its flexible design measures the impact on a wearer's head, as opposed to the impact on a helmet, which -- according to Kacyvenski -- means that the data it provides is more relevant and accurate than competing systems.
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Defensive end Corey Liuget grabbed Tebow's shoulder pads and started pulling him down, but not before Vaughn Martin, a 300-pound defensive lineman, came barreling at Tebow with a full head of steam and used the crown of his helmet to pound Tebow like a veal cutlet.
Hockey equipment company Bauer had made claims concerning a newly introduced helmet (the RE-AKT) that has revolutionized protection against head and brain injury.
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He was not in any control of another savage drive that brought him four off Hoggard, and was then felled by a brutal Flintoff bouncer that missed the back of the helmet as he took his eye of the ball and smacked into his head.
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Standing, that same firefighter's head might be exposed to temperatures hot enough to melt one's helmet and mask.
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One of the companies making headway in the Business of Concussions is Guardian Caps, which created a cap that an individual can place on an existing helmet for the stated purpose of reducing the impact in the case of a blow to the head.
Silver helmet, sometimes worn at a rakish angle when the heat and humidity made it slip off his head.
Andrew Hodd played some Tillakaratne Dilshan-style scoops over his head, particularly brave as he had been hit flush on the Sussex martlets badge on his helmet by a wayward Smith beamer whilst keeping wicket.
HITS, in which six sensors are placed inside the helmet of every player on the field, measuring the force and location of every blow he receives to the head.
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