场上不同位置的青少年男子足球运动员特征性运动自信心水平没有差异；

There was no significant difference for junior male soccer players at different position on field.

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采用开放式问卷，对我国U-17男子足球运动员的运动倦怠及其与人口学变量的关系进行研究。

By using the method of investigation, the research analyzed the burnout of male U-17 soccer athletes in China and the relationship between burnout and demography variable.

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研究发现各年龄段青少年男子足球运动员专项心理能力存在显著差异，一级运动员成绩明显高于二级运动员。

Study found that young men of all ages a special football player, there was a significant mental ability differences in performance level was significantly higher than athletes athletes 2.

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