需要直接观察球员，以准确量化青少年足球中的头球频率。
Direct player observation is needed to accurately quantify heading frequency in youth soccer.
作者信息
Harriss Alexandra, Walton David M, Dickey James P
机构信息
a School of Kinesiology , Western University , London , ON , Canada.
b School of Physical Therapy , Western University, Elborn College , London , ON , Canada.
出版信息
Res Sports Med. 2018 Apr-Jun;26(2):191-198. doi: 10.1080/15438627.2018.1431534. Epub 2018 Jan 24.
In soccer, heading may be related to subsequent neurological impairment. Accurate measures of heading exposure are therefore important. This study evaluated whether 12 female youth players accurately recalled their average number of headers over an entire soccer season (20 games total). Their self-reported average number of headers per game was multiplied by the number of games that they participated in, and were compared to actual number of headers extracted from game video. All players overestimated the number of headers compared to game video. Linear regression analysis indicated that self-reported headers overestimated the number of headers by 51%. While self-reports are a convenient way to estimate heading behaviour, they do not accurately represent the number of headers that players perform. Self-reports of heading exposure should be interpreted with caution.
在足球运动中，头球可能与随后的神经损伤有关。因此，对头球接触情况进行准确测量很重要。本研究评估了12名青年女子足球运动员是否能准确回忆起她们在整个足球赛季（共20场比赛）中的头球平均数。将她们自我报告的每场比赛头球平均数乘以她们参加的比赛场数，并与从比赛视频中提取的实际头球数进行比较。与比赛视频相比，所有球员都高估了头球次数。线性回归分析表明，自我报告的头球数比实际头球数高估了51%。虽然自我报告是估计头球行为的一种便捷方式，但它们并不能准确反映球员实际的头球次数。对头球接触情况的自我报告应谨慎解读。
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