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选拔运动员是训练工作的前提,基层学校的科研设备条件较差,选材工作难度大,教练员只能通过采用简单实用的观察、测试方法,对所得数据加以综合分析,进行初选。一、身体形态(一)运动员的身体形态是选材的重要条件身高决定着投掷出手时的出手高度,指间距决定着投掷用力的做功距离,体重决定着力量发展的潜力,所以这三项指标对标枪运动员的选材很重要。1.身高预测。成年身高(厘米)=13岁足长×7±3厘米2.指间距(臂展)预测。成年臂展(厘米)=13岁臂展(厘米)÷91.5%
The selection of athletes is the prerequisite for training. The conditions of scientific research equipment in grassroots schools are poor and the material selection work is very difficult. Coaches can only conduct preliminary analysis by using simple and practical observation and test methods and comprehensively analyzing the obtained data. First, the physical form (A) of the athlete’s body shape is an important material selection Height determines the throwing shot height, finger spacing determines the throwing force of the work distance, weight determines the power of development potential, so these three indicators of Selection of javelin throwers is very important. Height prediction. Adult height (cm) = 13-year-old foot length × 7 ± 3 cm 2. Finger spacing (arm expansion) prediction. Adult Arm Exhibition (cm) = 13 years old Arm Exhibition (cm) ÷ 91.5%