If there's one lesson from the USA Track and Field study, said Dr. Pereles, it is that "sudden changes are probably not a good idea."

皮若勒博士说：从美国田径研究结果能推得的一个教训就是，做任何突然的改变，可能都不是什么好主意。

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So is the primary takeaway of the USA Track and Field study that, whatever you're doing now in terms of stretching or not stretching, don't stop?

那么这是美国田联的研究是不是主要就说明，无论你现在是拉伸还是不拉伸，请继续保持原状？

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The outcry when USA Track and Field banned headphones in 2007 at sanctioned races like marathons was loud and pained (and the edict was widely ignored until it was revised last year).

当美国田径协会在2007年在对一些控制性比赛（比如马拉松）禁止使用耳机时，这种反对声是巨大而痛楚的（这个法令直到去年被重新修订后才重新被重视起来）。

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USA Track and Field Hall of Famer, Bill Bowerman, is credited with bringing jogging to the United States in the nineteen seventies.

VOA: special.2010.06.08

Seventy-three years later, American athletes are competing in the same stadium where Owens put on his iconic performance and USA Track & Field is recognizing the occasion by adding the initials "JO" above the heart on the team's uniforms.

VOA: standard.2009.08.19

Jill Geer is director of communications for USA Track and Field, a national governing body.

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The indoor track and field complex annually serves as the Conference USA Track and Field Championships site.

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"The leadership within USA Track and Field has been largely responsible for this problem getting as extensive as it has, " said Pound.

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