美国科学60秒 SSS 2013-05-13

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　　It's tough to have a job with the bosses always riding you. That's literally¹ the case with horse. Now a study finds that the stress experience by the acquire s conveying stress degree with the style and skill of the rider. The findings are turned out in the general experiental biology. Your average riders have two basic choices when they comes to stand on the moving steed. They can climb the frout type and try to * it or they can bar down with the w horse. Standing² at the as they rise of the saddle. But which is benefit the horse? Researchers films of s riders they try to using both techniques and they found riders who used more balancing rising trot³ actually keep the center of mass more steady when they stand which will deuces the forth⁴ on the horse's back. Now Jacky take the positions to the extreme.

　　My standing in the s for the entire ride. A Jacky center of mass follows an almost flat line which makes a fast rate to the finish. Let's bump, beast. Thanks for the minute for scientific American's 60-second science. I'm  Carrie Haphgn.

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