Related Experiment Video
Updated: Oct 6, 2025
06:14
In Vivo Protocol of Controlled Subconcussive Head Impacts for the Validation of Field Study Data
Published on: April 18, 2019
6.6K
Quantifying Collision Frequency and Intensity in Rugby Union and Rugby Sevens: A Systematic Review.
Lara Paul1,2, Mitchell Naughton3,4, Ben Jones5,6,7,8,9
1Division of Physiological Sciences, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Cape Town, South Africa. sharief.hendricks01@gmail.com.
Sports Medicine - Open
|January 20, 2022
Summary
Rugby players experience frequent and intense collisions. Training should mirror match demands, with rugby sevens players and forwards facing higher collision loads, to develop a "collision-fit" athlete.
Area of Science:
- Sports Science
- Biomechanics
- Injury Prevention
Background:
- Collisions in rugby (union and sevens) are frequent, intense, and linked to injuries and performance.
- Understanding collision data is crucial for effective player preparation and injury management.
Approach:
- Systematic literature review of 73 studies (1990-2021) using video analysis and microtechnology.
- Data synthesized from provincial, national, international, professional, and collegiate levels.
Key Points:
- Rugby union matches average 22 scrums, 116 rucks, and 156 tackles.
- Rugby sevens matches average 2 scrums, 5 rucks, and 14 tackles.
- Forwards experience more severe impacts than backs in rugby union.
Conclusions:
- More research quantifies match collisions than training collisions.
- Training should align with match collision demands for optimal player conditioning.
- Integrating video analysis and microtechnology enhances understanding of collision loads for "collision-fit" athletes.
Related Concept Videos
01:30Types of Impact
713
Impacts can be classified in various forms, primarily under two subgroups: central impact and oblique impact. A central impact occurs when two objects collide head-on, possessing opposite velocities aligned along the line of impact. Conversely, an oblique impact occurs when two objects collide at an angle, resulting in a modification of both direction and velocity.
The coefficient of restitution is a metric for understanding the dynamics of impacts. It quantifies the ratio of relative velocity...
The coefficient of restitution is a metric for understanding the dynamics of impacts. It quantifies the ratio of relative velocity...
713
01:19Types of Collisions - II
8.3K
When two or more objects collide with each other, they can stick together to form one single composite object (after collision). The total mass of the object after the collision is the sum of the masses of the original objects, and it moves with a velocity dictated by the conservation of momentum. Although the system's total momentum remains constant, the kinetic energy decreases, and thus such a collision is an inelastic collision. Most of the collisions between objects in daily life are...
8.3K
01:15Elastic Collisions: Case Study
14.5K
Elastic collision of a system demands conservation of both momentum and kinetic energy. To solve problems involving one-dimensional elastic collisions between two objects, the equations for conservation of momentum and conservation of internal kinetic energy can be used. For the two objects, the sum of momentum before the collision equals the total momentum after the collision. An elastic collision conserves internal kinetic energy, and so the sum of kinetic energies before the collision equals...
14.5K
01:00Elastic Collisions: Introduction
13.3K
An elastic collision is one that conserves both internal kinetic energy and momentum. Internal kinetic energy is the sum of the kinetic energies of the objects in a system. Truly elastic collisions can only be achieved with subatomic particles, such as electrons striking nuclei. Macroscopic collisions can be very nearly, but not quite, elastic, as some kinetic energy is always converted into other forms of energy such as heat transfer due to friction and sound. An example of a nearly...
13.3K
01:04Types Of Collisions - I
7.7K
When two objects come in direct contact with each other, it is called a collision. During a collision, two or more objects exert forces on each other in a relatively short amount of time. A collision can be categorized as either an elastic or inelastic collision. If two or more objects approach each other, collide and then bounce off, moving away from each other with the same relative speed at which they approached each other, the total kinetic energy of the system is said to be conserved. This...
7.7K
01:30Impact
245
Impact occurs when two bodies collide, leading to the application of impulsive forces between them. Analyzing impact mechanics involves considering two colliding particles moving along a line known as the line of impact, which passes through their centers and is perpendicular to the contact plane.
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
When particles with different initial velocities collide, they induce deformation by applying equal and opposite impulses. At the point of maximum deformation, the particles move together with...
245