Video Experimental Relacionado
Updated: Jan 13, 2026
05:04
Bouncing Ball with a Uniformly Varying Velocity in a Metronome Synchronization Task
Published on: September 21, 2017
6.4K
Diferencias en la velocidad angular entre lanzamientos rápidos de alta y baja velocidad en lanzadores de béisbol
Adam Nebel1, Abigail Schmitt2, Kevin Giordano3
1Auburn University - School of Kinesiology, 301 Wire Rd, Auburn, AL, USA, 36849.
Sports medicine and health science
|January 7, 2026
Resumen
Los lanzadores de béisbol universitarios muestran diferencias significativas en las velocidades angulares de la pelvis, el tronco, el hombro y el codo entre los lanzamientos rápidos de alta y baja velocidad. La optimización de la rotación y la secuencia de los segmentos puede aumentar la velocidad del lanzamiento.
Área de la Ciencia:
- Biomecánica
- Ciencias del Deporte
- Análisis de Béisbol
Sus antecedentes:
- La velocidad del lanzamiento es una métrica de rendimiento crítica en el béisbol.
- Comprender las diferencias cinemáticas entre lanzamientos de alta y baja velocidad puede informar las estrategias de entrenamiento.
Objetivo del estudio:
- Investigar las diferencias dentro del mismo lanzador en las velocidades angulares de la serie temporal de la pelvis, el tronco, el hombro y el codo.
- Comparar estas diferencias cinemáticas entre lanzamientos rápidos de alta y baja velocidad en lanzadores de béisbol universitarios.
Principales métodos:
- Análisis retrospectivo de datos cinemáticos de juego de 82 lanzadores de la División 1 de la NCAA.
- Se utilizó un sistema de captura de movimiento sin marcadores para recopilar datos.
- Se emplearon pruebas t de muestras pareadas de mapeo paramétrico estadístico (SPM) para comparaciones de series temporales de velocidades angulares durante el ciclo de lanzamiento.
Principales resultados:
- Todos los segmentos probados (pelvis, tronco, hombro, codo) exhibieron velocidades angulares significativamente más rápidas durante el lanzamiento rápido más rápido en comparación con el más lento.
- Se observaron diferencias significativas en varias fases del ciclo de lanzamiento para cada segmento.
Conclusiones:
- Las diferencias dentro del mismo sujeto en las velocidades angulares de la serie temporal distinguen la velocidad del lanzamiento rápido más allá de las métricas discretas.
- Los lanzadores pueden aumentar potencialmente la velocidad del lanzamiento aumentando la velocidad de rotación de cada segmento corporal y optimizando la secuencia de movimiento.
Más Videos Relacionados
11:51Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
Published on: February 22, 2018
9.1K
06:52An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field
Published on: May 26, 2020
8.5K
Videos de Conceptos Relacionados
01:11Angular Velocity and Acceleration
11.5K
We previously discussed angular velocity for uniform circular motion, however not all motion is uniform. Envision an ice skater spinning with their arms outstretched; when they pull their arms inward, their angular velocity increases. Additionally, think about a computer's hard disk slowing to a halt as the angular velocity decreases. The faster the change in angular velocity, the greater the angular acceleration. The instantaneous angular acceleration is defined as the derivative of...
11.5K
01:08Angular Velocity and Displacement
22.4K
Uniform circular motion is motion in a circle at a constant speed. Although this is the simplest case of rotational motion, it is very useful for many situations and is used to introduce rotational variables. When a particle is moving in a circle, the coordinate system is fixed and serves as a frame of reference to define the particle’s position. Its position vector from the origin of the circle to the particle sweeps out the angle θ, which increases in the counterclockwise direction...
22.4K
01:09Relating Angular And Linear Quantities - I
8.0K
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...
8.0K
01:12Average Velocity
22.3K
To calculate the other physical quantities in kinematics, we must introduce the time variable. The time variable allows us not only to state the position of the object during its motion, but also how fast it is moving. The speed at which an object is moving is given by the rate at which the position changes with time. For each position xi, we assign a particular time ti. If the details of the motion at each instant are not important, the rate is usually expressed as the average velocity. This...
22.3K
01:24Relative Motion Analysis - Velocity
682
A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
682
01:37Rotation with Constant Angular Acceleration - I
8.1K
If angular acceleration is constant, then we can simplify equations of rotational kinematics, similar to the equations of linear kinematics. This simplified set of equations can be used to describe many applications in physics and engineering where the angular acceleration of a system is constant.
Using our intuition, we can begin to see how rotational quantities such as angular displacement, angular velocity, angular acceleration, and time are related to one another. For example, if a flywheel...
Using our intuition, we can begin to see how rotational quantities such as angular displacement, angular velocity, angular acceleration, and time are related to one another. For example, if a flywheel...
8.1K