関連する実験動画
Updated: Sep 10, 2025

02:43
Importance of Jumping Ability in Handball Throwing Speed and Accuracy
Published on: April 4, 2025
637
高校野球のピッチャーにおける最大全身およびセグメンタル角度モメンタが速いボール速度とどのように関係しているか
Jun Ming Liu1, Christopher Knowlton2, Matthew Gauthier3
1Stevens Institute of Technology, Hoboken, NJ, USA.
Journal of biomechanics
|August 26, 2025
まとめ
野球のピッチャーは,ボディの質量中心 (LCOM) についての角運動量を使用して回転を生成します. 体全体と体幹のLCOMの上昇は,投球速度と正の相関関係があり,投球のパフォーマンスの重要性を示しています.
科学分野:
- 野球の投球の生体力学
- スポーツ科学とパフォーマンス分析
- 人間の運動と運動学
背景:
- 質量中心の角運動 (LCOM) は,野球のピッチングにおける全身およびセグメンタル回転に不可欠である.
- 投球中のLCOMの特殊な特徴と,ファストボールの速度との関係は,まだ完全に理解されていません.
- LCOMの調査は,ピッチングのパフォーマンスを影響する重要な生体力学的要因を明らかにします.
研究 の 目的:
- 野球のピッチング中に全身およびセグメンタルLCOMを特徴づける.
- LCOMとファストボールの速度との関連を判別する.
- ボール速度の上昇と正の相関があるという仮説を検証する
主な方法:
- 20人の高校の投手からの 速球を記録するために 光学的なモーションキャプチャーを使った
- 質量中心 (LCOM) に関する計算された角運動量.
- ボールの速度とLCOMの間の関連性を分析するために,線形混合モデルを使用した.
主要な成果:
- ボールの速度は,小さな効果サイズにもかかわらず,左方向軸に関する最大全身およびトランクLCOMと有意な正の関連を示した.
- 野球のピッチングにおける特徴的なLCOMプロファイルが特定され,ピークLCOMはボディセグメントで連続的に発生する.
- 全身,トランク,ピッチングアームの最大LCOMは,主に左向きと上向きの軸について観察されました.
結論:
- 全身と幹のLCOMは,左向きの軸は,ファストボールの速度と正に関連しています.
- セグメンタルLCOMの連続的なピークは,体の下部からトランクとピッチングアームへの運動連鎖の転送をサポートします.
- これらのLCOMの特徴を理解することで,ピッチングのパフォーマンスを高めるためのトレーニング戦略を伝えることができます.
関連する概念動画
Principle of Angular Impulse and Momentum: Problem Solving
268
Consider a ball of mass m, attached to a massless rod of known length, subjected to a time-dependent torque. If the initial velocity of the mass is known, then the final velocity of the mass for time t can be determined using the principle of angular impulse and momentum.
Initially, a free-body diagram of the system is drawn to illustrate all the forces acting upon the system, providing a crucial understanding of the dynamics at play. Then, the principle of angular impulse and momentum is...
Initially, a free-body diagram of the system is drawn to illustrate all the forces acting upon the system, providing a crucial understanding of the dynamics at play. Then, the principle of angular impulse and momentum is...
268
Relation Between Moment of a Force and Angular Momentum
718
In the realm of spinning tops, the application of force at a distance from the center produces torque, a pivotal factor that alters the angular momentum of the top, thereby inducing its rotation. The concept of moment, akin to linear force in rotation, quantifies how a force acting upon an object initiates rotational motion. Angular momentum serves as the rotational counterpart to linear momentum, representing an object's inherent tendency to persist in its rotational state.
The temporal...
The temporal...
718
Force and Momentum
16.1K
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,...
16.1K
Angular Momentum about an Arbitrary Axis
254
Imagine a rigid body with a mass denoted as 'm', which has its center of mass at point G and is rotating around an inertial reference frame. The angular momentum at an arbitrary point P can be calculated by taking the cross product of the position vector and linear momentum vector for each individual mass element.
The velocity of a mass element comprises its translational velocity and the relative velocity instigated by the body's rotation. Substituting the velocity equation into...
The velocity of a mass element comprises its translational velocity and the relative velocity instigated by the body's rotation. Substituting the velocity equation into...
254
Relating Angular And Linear Quantities - I
6.8K
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...
6.8K
Motion of a Projectile
1.2K
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.
1.2K

