In bobsledding, weight matters just as much as it does on a motorcycle. Your head sits at the extreme end of your body, which means any movement or forces your body experiences are magnified by the time they reach your head. A few G-Forces are no big deal for your torso, but they are enough to bend your head over onto your shoulders. Rapid acceleration or deceleration, again, your head can be thrown backwards or forwards. Any gram you can save on a helmet reduces those effects. The helmet has other advantages, of course. Its horizon line — the level at which your vision is cut off while peering upwards in a tuck — is exceptionally high. That makes its vision while tucked in exceptionally good; an advantage on two wheels and while operating a bobsled. This is a huge advantage, allowing bobsledders to see further down the track without sacrificing aerodynamics
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