Related Experiment Video
Updated: Feb 9, 2026
08:50
High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements
Published on: May 12, 2023
2.8K
Push-off forces in elite short-track speed skating
Eline van der Kruk1, Marco M Reijne1, Bjorn de Laat2
1a Department of Biomechanical Engineering , Delft University of Technology , Delft , The Netherlands.
Sports Biomechanics
|May 31, 2018
Summary
Elite short-track speed skaters
Area of Science:
- Sports Science
- Biomechanics
- Skate Technology
Background:
- Short-track speed skating performance relies on efficient push-off forces.
- Analyzing skater technique can reveal performance enhancement opportunities.
- Novel instrumented skates offer advanced force measurement capabilities.
Purpose of the Study:
- To analyze push-off forces in elite short-track speed skaters.
- To identify technique variations impacting performance.
- To inform the design of improved skating techniques and equipment.
Main Methods:
- Utilized a newly designed instrumented short-track speed skate for force analysis.
- Recorded push-off forces and center of pressure (COP) during four distinct skating strokes.
- Analyzed data from six elite male short-track speed skaters.
Main Results:
- Significant diversity in force execution was observed among elite male skaters at similar speeds.
- Skaters with better personal records (PRs) maintained COP more rearward on the blade during specific phases.
- A trend indicated better-performing male skaters exhibited lower lateral peak forces entering curves.
Conclusions:
- Skater technique, specifically COP placement and lateral force application, significantly influences short-track speed skating performance.
- Instrumented skates provide valuable data for biomechanical analysis and performance optimization.
- Further research should explore sex-based differences in force application at various speeds.
Related Concept Videos
01:18Drag Force and Terminal Speed
3.5K
An interesting force in everyday life is the force of drag on an object when it is moving in a fluid. Like friction, the drag force always opposes the motion of an object. Unlike simple friction, the drag force is proportional to some function of the velocity of the object in that fluid. This functionality is complicated and depends upon the shape of the object, its size, its velocity, and the fluid it is in. For most large objects, such as cyclists, cars, and baseballs, that are not moving too...
3.5K
03:00Intermolecular vs Intramolecular Forces
97.5K
Intermolecular forces (IMF) are electrostatic attractions arising from charge-charge interactions between molecules. The strength of the intermolecular force is influenced by the distance of separation between molecules. The forces significantly affect the interactions in solids and liquids, where the molecules are close together. In gases, IMFs become important only under high-pressure conditions (due to the proximity of gas molecules). Intermolecular forces dictate the physical properties of...
97.5K
01:27Drive-Reduction Theory: Push Theory of Motivation
1.3K
Clark Hull's drive-reduction theory, introduced in the 1940s and 1950s and often termed the "push theory" of motivation, provides a framework for understanding how biological and learned drives influence behavior. Hull suggested that motivation originates from the need to alleviate physiological tension caused by unmet biological necessities. The theory proposes that when a basic need, such as hunger or sleep, goes unfulfilled, it creates an internal imbalance. This imbalance, or...
1.3K
03:13Intermolecular Forces
71.7K
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen...
71.7K
01:08Speed of Sound in Gases
4.1K
The speed of sound in a gaseous medium depends on various factors. Since gases constitute molecules that are free to move, they are highly compressible. Hence, sound waves travel slowly through gases. Thermodynamics helps us understand the relationship between pressure, volume, and temperature of gases, thus, the speed of sound in an ideal gas can be determined using the laws of thermodynamics. At the same time, Newton's laws of motion and the continuity equation of fluid dynamics also come...
4.1K
01:13Speed of a Transverse Wave
4.0K
The speed of a wave depends on the characteristics of the medium. For example, in the case of a guitar, the strings vibrate to produce the sound. The speed of the waves on the strings and the wavelength determine the frequency of the sound produced. The strings on a guitar have different thicknesses but may be made of similar material. They have different linear densities, and the linear density is defined as the mass per length.
One of the key properties of any wave is the wave speed. Light...
One of the key properties of any wave is the wave speed. Light...
4.0K