高中和职业棒球投手中的投篮机制和肩膀前部力之间的关系
Joseph E Manzi1, Allen Nicholson2, Brittany Dowling3
1Weill Cornell Medical College, New York, NY, USA.
Shoulder & elbow
|March 1, 2024
概括
棒球投手在前肩部施加过多的压力会导致旋转器袖口受伤. 这项研究确定了预测这种力量的关键投机制,为高中和职业运动员的伤害预防提供了见解.
科学领域:
- 生物力学 生物力学
- 运动医学 运动医学
- 整形外科 整形外科 整形外科
背景情况:
- 过度的前肩力与棒球投手的旋转形病理有关.
- 与此相关的问题包括前部松,后部硬以及门关节的碰撞.
- 导致过度前肩力作用的特定运动尚不清楚.
研究的目的:
- 在高中和职业棒球投手中,识别和量化与过度前肩力相关的明显投球运动.
- 根据动力学和时间特征开发前肩力预测模型.
主要方法:
- 3D运动捕捉 (480 Hz) 用于分析高中和职业投手的快球投.
- 采用随机森林模型,确定肩前力的主要预测因素.
- 计算了标准化回归系数,以确定这些预测者的方向性.
主要成果:
- 随机森林模型解释了职业投手 (R2=0.96) 的最大差异,但高中投手 (R2=0.41) 的差异较小.
- 高中投手的关键预测因素包括肩部最大外部旋转时的干部曲,释放球时的肩部外部旋转以及释放球时的肩部绑架.
- 对于职业投手来说,脚接触时的肩膀水平引,脚接触时的肩膀外部旋转和肘部最大延伸速度是重要的预测因素.
结论:
- 一个子集的特征足够地解释了专业投手前肩力的大多数变异,但对于高中投手来说不那么重要.
- 在这两组人群中,肩部时间和动力运动是前肩力的主要预测因素.
- 尽量减少力量的建议包括在高中投手释放球时减少肩膀绑架,以及在专业人士的脚接触时减少肩膀水平引.
相关概念视频
Muscles of the Shoulder
3.8K
The muscles surrounding the shoulder girdle, including the clavicle and scapula, primarily stabilize the scapula. This stable base allows other muscles to move the humerus effectively. Scapular movements often mirror those of the humerus and extend its range of motion. For instance, raising the arm above the head would not be feasible without simultaneous upward rotation of the scapula.
Anterior Thoracic Muscles
The anterior thoracic muscles include the serratus anterior, subclavius, and...
Anterior Thoracic Muscles
The anterior thoracic muscles include the serratus anterior, subclavius, and...
3.8K
Motion of a Projectile
800
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.
800
Force and Momentum
15.9K
Force and momentum are intimately related. Force acting over time can change momentum, and Newton's second law of motion can be stated in its most broadly applicable form in terms of momentum. Momentum can be applied to systems where the mass is changing, such as rockets, as well as to systems of constant mass. Also, momentum continues to be a key concept in the study of atomic and subatomic particles in quantum mechanics. One can consider systems with varying mass in some detail; however,...
15.9K
Projectile Motion
15.3K
An object thrown in the air follows a parabolic path under the influence of Earth's gravitational force. The motion of such an object is called projectile motion, and the object itself a projectile. The parabolic path followed by the projectile is called the trajectory. Some common examples of projectile motion are the launching of fireworks, a golf ball in the air, meteors entering the Earth's atmosphere, and the firing of bullets.
When an object falls under gravity and has no...
When an object falls under gravity and has no...
15.3K
Projectile Motion: Equations
10.3K
Projectile motion is commonly observed in our day-to-day life. For example, a basketball thrown by a player, an arrow shot from a bow, and kids jumping into the pool, all undergo projectile motion.
Any projectile motion problem can be solved by using the following strategy:
Any projectile motion problem can be solved by using the following strategy:
10.3K
Bones of the Upper Limb: Humerus
3.2K
The upper limb consists of the arm, forearm, wrist, and hand bones. The humerus is the single bone of the upper arm region. Proximally, it has a large, spherical, smooth head that articulates with the glenoid cavity of the scapula to form the glenohumeral or shoulder joint. The margin of the head is the anatomical neck, a residual epiphyseal plate. Laterally it extends to form bony projections called the greater tubercle and the lesser tubercle. Next to the tubercles is the surgical neck, a...
3.2K


