在初始冲刺加速过程中的地面反应力与垂直力-速度概况之间的关系
Motoki Katsuge1, Hikaru Kurosaki1,2, Hiromu Watanabe3
1Graduate School of Sport Sciences, Waseda University, Tokorozawa, Japan.
PloS one
|July 15, 2025
概括
在冲刺加速过程中,最大的下肢力量和动力增强了地面反应力. 量身定制的力量训练可以通过针对特定步骤需求来提高冲刺表现.
科学领域:
- 生物力学 生物力学
- 运动科学 运动科学 运动科学
- 人类运动 人类运动
背景情况:
- 冲刺加速依赖于有效的地面反应力 (GRF) 生成.
- 下肢的机械能力,特别是力-速度 (F-V) 概况,对于运动员的表现至关重要.
- 了解F-V形状特征与冲刺GRF之间的关系对于优化训练至关重要.
研究的目的:
- 为了研究冲刺加速度期间地面反应力和从垂直力-速度 (F-V) 配置文件中得出的下肢机械性能之间的关系.
- 为了确定理论上的最大力 (F0),速度 (V0) 和峰值功率 (Pmax) 在冲刺加速的不同阶段与GRF的关系.
主要方法:
- 31名男大学棒球运动员完成了15米冲刺加速.
- 在第一步,第五步和第九步测量了地面反应力 (GRF) 和腿部延伸速度.
- 评估了力-速度 (F-V) 概况,使用不同负载的式跳跃来确定F0,V0和Pmax.
主要成果:
- 理论上的最大力 (F0) 在所有冲刺步骤中与水平的GRF显示了中等到大的相关性.
- 峰值功率 (Pmax) 与第五步和第九步的水平GRF以及第九步的结果GRF相关.
- 动态下肢强度测量通常与GRF无关,但第一步的显著例外.
结论:
- 最大下肢力量 (F0) 与在冲刺加速过程中产生更大的水平GRF有关.
- 下肢功率 (Pmax) 与在早期加速的后期阶段水平GRF增加有关.
- 应个性化力量训练计划,以满足冲刺加速每一步的特定神经肌肉需求,以提高性能.
更多相关视频
10:52Simulation of Human-induced Vibrations Based on the Characterized In-field Pedestrian Behavior
Published on: April 13, 2016
8.9K
06:35Using Gold-standard Gait Analysis Methods to Assess Experience Effects on Lower-limb Mechanics During Moderate High-heeled Jogging and Running
Published on: September 14, 2017
9.2K
相关概念视频
Velocity and Position by Graphical Method
8.2K
Velocity and position can be calculated from the known function of acceleration as a function of time. The total area under the acceleration-time graph and the velocity-time graph gives the change in velocity and position, respectively. In the case of an airplane, its acceleration is tracked using the inertial navigation system. The pilot provides the input of the airplane's initial position and velocity before takeoff. The inertial navigation system then uses the acceleration data to...
8.2K
Impact: Problem Solving
261
In an experiment conducted during a Mars mission, a rover propels a projectile with an initial velocity, and the projectile rebounds after colliding with the Martian surface. To ascertain the maximum height attained by the projectile after this collision, the known restitution coefficient and acceleration due to gravity are employed.
By designating the launch point as the origin and utilizing kinematic equations, the vertical component of the projectile's velocity at the point of impact is...
By designating the launch point as the origin and utilizing kinematic equations, the vertical component of the projectile's velocity at the point of impact is...
261
Rocket Propulsion in Gravitational Field - II
2.4K
A rocket's velocity in the presence of a gravitational field is decreased by the amount of force exerted by Earth's gravitational field, which opposes the motion of the rocket. If we consider thrust, that is, the force exerted on a rocket by the exhaust gases, then a rocket's thrust is greater in outer space than in the atmosphere or on a launch pad. In fact, gases are easier to expel in a vacuum.
A rocket's acceleration depends on three major factors, consistent with the...
A rocket's acceleration depends on three major factors, consistent with the...
2.4K
Measuring Acceleration Due to Gravity
693
Consider a coffee mug hanging on a hook in a pantry. If the mug gets knocked, it oscillates back and forth like a pendulum until the oscillations die out.
A simple pendulum can be described as a point mass and a string. Meanwhile, a physical pendulum is any object whose oscillations are similar to a simple pendulum, but cannot be modeled as a point mass on a string because its mass is distributed over a larger area. The behavior of a physical pendulum can be modeled using the principles of...
A simple pendulum can be described as a point mass and a string. Meanwhile, a physical pendulum is any object whose oscillations are similar to a simple pendulum, but cannot be modeled as a point mass on a string because its mass is distributed over a larger area. The behavior of a physical pendulum can be modeled using the principles of...
693
Projectile Motion
17.2K
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...
17.2K
Motion of a Projectile
1.3K
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.
1.3K
