相关实验视频
Updated: Jun 6, 2025

02:43
Importance of Jumping Ability in Handball Throwing Speed and Accuracy
Published on: April 4, 2025
236
在职业棒球联赛中,球释放点变化和投球表现之间的关系
Kazuki Wakamiya1, Hideaki Nagamoto2,3, Ryusei Yamaguchi1
1Graduate School of Sport Sciences, Waseda University, Saitama, Japan.
Frontiers in sports and active living
|December 3, 2024
概括
具有较少可变球释放点的职业棒球投手可以获得更好的表现. 减少水平释放点的变化可以提高罢工率,减少主场,优化投篮机制.
科学领域:
- 运动科学 运动科学 运动科学
- 生物力学 生物力学
- 棒球分析 棒球分析
背景情况:
- 棒球中的投手表现受到复杂的生物力学因素的影响.
- 了解球释放点一致性的细微差别对于球员发展至关重要.
研究的目的:
- 为了研究球释放点变化和职业棒球中的投球表现之间的关系.
- 为了比较大联盟棒球 (MLB) 和小联盟棒球 (MiLB) 投手之间的释放点变化.
主要方法:
- 利用开源数据进行分析.
- 采用多重回归分析来评估绩效相关性.
- 在MLB和MiLB球员之间比较发布点数据.
主要成果:
- 美国职业棒球大联盟的投手表现出比美国职业棒球大联盟的投手更低的球释放点变化.
- 投篮表现与球释放点的变化有很强的相关性,特别是在水平平面.
- 水平释放点的变化最能预测罢工能力.
结论:
- 尽量减少水平球释放点的变化可能会提高投球效率,导致更多的罢工和更少的本垒打.
- 这些发现为开发先进的投篮训练方法提供了数据驱动的基础.
- 这项研究可以为改善棒球运动员表现的技术解决方案提供信息.
相关概念视频
Motion of a Projectile
708
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.
708
Regression Toward the Mean
6.3K
Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when...
6.3K
Standard Deviation
15.8K
The most commonly used measure of variation is the standard deviation. It is a numerical value measuring how far data values are from their mean. The standard deviation value is small when the data are concentrated close to the mean, exhibiting slight variation or spread. The standard deviation value is never negative, it is either positive or zero. The standard deviation is larger when the data values are more spread out from the mean, which means the data values are exhibiting more variation.
15.8K
Variation: Normal Distribution, Range, and Standard Deviation
22.2K
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...
22.2K
Variation
6.7K
An important characteristic of any set of data is the variation in the data. In some data sets, the data values are concentrated closely near the mean; in other data sets, the data values are more widely spread out from the mean. The most common measure of variation, or spread, is the standard deviation, which is the square root of variance.
When independent and dependent variables are plotted on a scatter plot, the slope of a line is a value that describes the rate of change between the two...
When independent and dependent variables are plotted on a scatter plot, the slope of a line is a value that describes the rate of change between the two...
6.7K
Relating Angular And Linear Quantities - I
6.5K
If the rotational definitions are compared with the definitions of linear kinematic variables from motion along a straight line and motion in two and three dimensions, we can observe a mapping of the linear variables to the rotational ones.
When comparing the linear and rotational variables individually, the linear variable of position has physical units of meters, whereas the angular position variable has dimensionless units of radians, as it is the ratio of two lengths. The linear velocity...
When comparing the linear and rotational variables individually, the linear variable of position has physical units of meters, whereas the angular position variable has dimensionless units of radians, as it is the ratio of two lengths. The linear velocity...
6.5K

