Related Experiment Video
Updated: Nov 7, 2025

06:52
An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field
Published on: May 26, 2020
8.2K
Horizontal Force-Velocity-Power Profiling of Rugby Players: A Cross-Sectional Analysis of Competition-Level and
Casey M Watkins1,2, Adam Storey1, Michael R McGuigan1,3
1Sports Performance Research Institute New Zealand, Auckland University of Technology, Auckland, New Zealand.
Journal of Strength and Conditioning Research
|April 30, 2021
Summary
Rugby players
Area of Science:
- Sports Science
- Biomechanics
- Rugby Union Performance Analysis
Background:
- Speed and acceleration are critical for success in rugby union.
- Player performance varies based on competition level and specific on-field positions.
- Understanding these differences is key for targeted training programs.
Purpose of the Study:
- To analyze maximal sprint performance and horizontal force-velocity (FV) profiles in rugby union players.
- To compare these characteristics across different competition levels (amateur, professional, international).
- To examine position-specific differences in sprint dynamics and FV profiles.
Main Methods:
- 176 rugby union players from various competition levels and positions were assessed.
- Maximal horizontal force-velocity (FV) profiles were determined.
- 30-meter sprint performance was measured, with split times recorded at 10m and 20m.
Main Results:
- International and professional players showed superior sprint times and FV profiles compared to club players.
- International players excelled in early acceleration (0-10m), while professionals were faster in later stages (10-20m) with more force-dominant profiles.
- Outside backs demonstrated the highest maximal velocity, whereas forwards exhibited more force-dominant profiles.
Conclusions:
- Competition level significantly impacts sprint performance and FV profiles in rugby players.
- Distinct positional demands necessitate tailored physical attributes and training strategies.
- Force-velocity profiling offers valuable insights into the specific physical requirements of different rugby positions.
Related Concept Videos
Motion of a Projectile
1.8K
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.
1.8K
Velocity Potential
520
In steady, incompressible flow through a long, straight pipe with a uniform cross-section, the flow in the central region (far from the pipe walls) is irrotational. This irrotational nature means that fluid particles do not rotate around their axes, and a scalar function called the velocity potential, represented by ϕ, can be used to describe their movement. In irrotational flows, the velocity field V is defined as the gradient of the velocity potential:
520
Force and Momentum
19.4K
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, the...
19.4K
Two-Dimensional Force System
1.4K
A two-dimensional system in mechanical engineering involves the analysis of motion and forces in a plane. A two-dimensional force vector can be resolved into its components as:
1.4K
Velocity and Position by Graphical Method
8.9K
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...
8.9K
Three-Dimensional Force System
2.6K
In mechanical engineering, a three-dimensional force system is a system of forces acting in three dimensions, with forces applied along the x, y, and z coordinate axes. The three-dimensional force system is an important concept in mechanical engineering, as it allows engineers to understand and analyze the behavior of objects and structures in three dimensions. By understanding the forces acting on a system, engineers can design more efficient and effective mechanical systems that can withstand...
2.6K

