【新地平线英语】（第三册）运动有奇效吗？(5/5)
概述：另一名专家皮尔斯·J. 霍华德说，新的研究表明，体育锻炼提高了大脑中某些激发神经细胞生长的化学物质的含量。。。
Hints:
Pierce J. Howard
PS:8秒左右有连字符
http://t1.g.hjfile.cn/listen/201310/201310110904452214964.mp3But until recently, the academic edge gained by participating in sports was thought to come from the increased self-confidence, the better mood, and the ability to concentrate that comes from burning off steam in exercise. Now, however, some scientists have revised their way of thinking, and point to possible physical connections.
Pierce J. Howard, another expert, says new research indicates that physical exercise increases the amount of certain brain chemicals that stimulate growth of nerve cells. Consequently, the brains of people who exercise may be better equipped to tackle mental challenges.
Inactivity may also have negative effects on mind and body alike. "Scientists recognize that mind is body, and body is mind," comments Howard. The most beneficial forms of exercise, he says, engage both.但直到最近，人们还是认为因参加体育运动而获得的学业优势来自于增强的自信、更好的心态，以及运动后所带来的集中注意力的能力。而现在，一些科学家修正了他们的看法，表示这可能与身体状况有关。
另一名专家皮尔斯•J. 霍华德说，新的研究表明，体育锻炼提高了大脑中某些激发神经细胞生长的化学物质的含量。因此，那些进行锻炼的人的大脑可能更有能力应付各种智力挑战。
不活动对大脑和身体都可能有负面影响。“科学家们认识到，心即是身，身即是心，”霍华德评价道。他说，最有益的运动能身心兼顾。
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