相关实验视频
Updated: Jul 5, 2025

02:43
Importance of Jumping Ability in Handball Throwing Speed and Accuracy
Published on: April 4, 2025
358
在年轻的男排精英运动员中,出生四分位数和垂直跳的表现之间是否存在关系?
Henrique de Oliveira Castro1, Ricardo Franco Lima2,3, Lucas Savassi Figueiredo4
1Universidade Federal de Mato Grosso - UFMT, Cuiabá, Brazil.
Perceptual and motor skills
|January 25, 2024
概括
在所有巴西青少年排球年龄组中都发现了相对年龄的影响,但与垂直跳的表现没有一致的相关性. 建议制定策略,确保所有运动员都有公平的机会.
科学领域:
- 运动科学 运动科学 运动科学
- 人类运动科学科学 人类运动科学
- 排球表现分析 排球表现分析
背景情况:
- 垂直跳跃是排球成功的一个关键决定因素.
- 相对年龄效应 (RAE) 可能会影响青少年运动中的技能发展和选择.
- 了解RAE对排球体育表现的影响对于人才识别和发展至关重要.
研究的目的:
- 研究巴西男青少年排球运动员出生四分位数和垂直跳跃表现之间的关系.
- 确定不同年龄类别 (U17,U18,U19,U21) 中是否存在相对年龄效应.
- 分析出生日期与尖峰和块跳高度之间的关联.
主要方法:
- 奇方位适合性测试用于评估出生季度的出生日期分布.
- 单向ANOVA根据出生四分位数对比垂直跳跃高度 (尖峰和块).
- 分析了巴西U17,U18,U19和U21男子青少年排球运动员的数据.
主要成果:
- 在所有年龄类别 (U17,U18,U19,U21) 中观察到显著的相对年龄效应.
- 在Q2出生的U18运动员显示了比Q4出生的人更高的尖峰和块跳高度.
- 在Q1出生的U19运动员的跳跃高度比Q3出生的人高;在U17和U21运动员的跳跃表现中,在出生四分位数中没有发现显著差异.
结论:
- 虽然相对年龄效应在巴西青少年排球中普遍存在,但它并不能始终转化为所有年龄组中优越的垂直跳跃表现.
- 教练和政策制定者应该实施减轻RAE的策略,并确保在资格年度晚些时候出生的运动员获得公平机会.
- 进一步的研究可能会探索其他表现指标和受排球相对年龄影响的发育因素.
相关概念视频
Quartile
4.2K
Quartiles are numbers that separate the data into quarters. Quartiles may or may not be part of the data. To find the quartiles, first, find the median or second quartile. The first quartile, Q1, is the middle value of the lower half of the data, and the third quartile, Q3, is the middle value, or median, of the upper half of the data. To get the idea, consider the same data set:
1; 1; 2; 2; 4; 6; 6.8; 7.2; 8; 8.3; 9; 10; 10; 11.5
The median or second quartile is seven. The lower half of the...
1; 1; 2; 2; 4; 6; 6.8; 7.2; 8; 8.3; 9; 10; 10; 11.5
The median or second quartile is seven. The lower half of the...
4.2K
Applications of Normal Distribution
5.1K
The normal distribution is a useful statistical tool. One of its practical applications is determining the door height after considering the normal distribution of heights of persons, such that many can pass through it easily without striking their heads. The normal distribution can also determine the probability of a person having a height less than a specific height.
The heights of 15 to 18-year-old males from Chile from 1984 to 1985 followed a normal distribution. The mean height is 172.36...
The heights of 15 to 18-year-old males from Chile from 1984 to 1985 followed a normal distribution. The mean height is 172.36...
5.1K
Percentage Frequency Distribution
58.0K
A percentage frequency distribution, in general, is a display of data that indicates the percentage of observations for each data point or grouping of data points. It is a commonly used method for expressing the relative frequency of survey responses and other data. The percentage frequency distributions are often displayed as bar graphs, pie charts, or tables.
The process of making a percentage frequency distribution involves the following few steps: note the total number of observations;...
The process of making a percentage frequency distribution involves the following few steps: note the total number of observations;...
58.0K
Motion of a Projectile
811
Projectile motion becomes evident when a player kicks the ball into the air. The launch angle, or the angle at which the ball is kicked, plays a crucial role in determining the trajectory of the projectile. As the ball soars through the air, influenced solely by gravity, its motion can be dissected into two independent velocity components: the horizontal and the vertical.
Horizontal motion, governed by the initial kick, maintains a constant velocity throughout the flight of the soccer ball.
Horizontal motion, governed by the initial kick, maintains a constant velocity throughout the flight of the soccer ball.
811
Variation: Normal Distribution, Range, and Standard Deviation
22.3K
In the field of psychology, there are several ways to organize measurements of a trait, feature, or characteristic (i.e., variables). Qualitative data, such as ethnicity, can be tabulated into a frequency count to provide information about the proportion, as well as the variety of groups in a sample or population. On the other hand, researchers can perform a wider set of calculations on quantitative data. The mean, mode, and median, for instance, are central tendency measures to identify a...
22.3K
Boxplot
8.2K
Box plots (also called box-and-whisker plots or box-whisker plots) give an excellent graphical image of the concentration of the data. They also show how far the extreme values are from most data. A box plot is constructed from five values: the minimum value, the first quartile, the median, the third quartile, and the maximum value. We use these values to compare how close other data values are to them. To construct a box plot, use a horizontal or vertical number line and a rectangular box. The...
8.2K

