Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Drag Force and Terminal Speed01:18

Drag Force and Terminal Speed

3.7K
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...
3.7K
Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

724
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
724
Rolling Resistance: Problem Solving01:17

Rolling Resistance: Problem Solving

953
Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
953
Relative Motion Analysis - Acceleration01:10

Relative Motion Analysis - Acceleration

1.1K
A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
1.1K
Relative Motion Analysis - Velocity01:24

Relative Motion Analysis - Velocity

975
A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
975
Drag01:23

Drag

618
Drag is a resistive force opposing an object’s motion through a fluid, resulting from surface pressure and shear forces. It comprises two components: a perpendicular one from pressure and a tangential one from shear stress. Accurate drag calculations use pressure and wall shear stress distributions, often determined through Computational Fluid Dynamics (CFD) or wind tunnel testing. The drag coefficient, a dimensionless measure, depends on factors like shape, Reynolds number, Mach number,...
618

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Task complexity and social identity interact to shape interpersonal coordination in rugby union.

Acta psychologica·2026
Same author

Stroke Rate and Arm Coordination Management in Swimming in A Double Paralympic Triathlete Champion.

Journal of sports science & medicine·2026
Same author

Degeneracy of the perceptual-motor system for aperture crossing in cycling.

Human movement science·2026
Same author

Tracking the Reorganizations of MVPA Opportunities During the Transition From French Secondary School to University: A Longitudinal Study.

Research quarterly for exercise and sport·2025
Same author

Understanding the differences in boys' and girls' involvement in physical education in French high school context: An ecological approach.

Journal of sports sciences·2025
Same author

Lower-limb coordination pattern variability while clearing successive hurdles.

Acta psychologica·2025

Related Experiment Video

Updated: Apr 20, 2026

Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion
08:55

Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion

Published on: February 5, 2020

8.0K

Relationships between coordination, active drag and propelling efficiency in crawl.

Ludovic Seifert1, Christophe Schnitzler2, Gautier Bideault3

  • 1Centre d'Etude des Transformations des Activités Physiques et Sportives (CETAPS) - EA 3832, University of Rouen, Faculty of Sports Sciences, France.

Human Movement Science
|December 3, 2014
PubMed
Summary

Swimmers adapt their arm coordination (IdC) to aquatic drag (D) for efficient propulsion. Individual strategies optimize force and power, as high coordination doesn't always mean high propulsive efficiency (ep).

Keywords:
BiomechanicsDragMotor controlPropulsionSwimming

More Related Videos

Manufacturing, Control, and Performance Evaluation of a Gecko-Inspired Soft Robot
07:40

Manufacturing, Control, and Performance Evaluation of a Gecko-Inspired Soft Robot

Published on: June 10, 2020

16.3K
Paw-Dragging: a Novel, Sensitive Analysis of the Mouse Cylinder Test
09:14

Paw-Dragging: a Novel, Sensitive Analysis of the Mouse Cylinder Test

Published on: April 29, 2015

25.2K

Related Experiment Videos

Last Updated: Apr 20, 2026

Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion
08:55

Determining and Controlling External Power Output During Regular Handrim Wheelchair Propulsion

Published on: February 5, 2020

8.0K
Manufacturing, Control, and Performance Evaluation of a Gecko-Inspired Soft Robot
07:40

Manufacturing, Control, and Performance Evaluation of a Gecko-Inspired Soft Robot

Published on: June 10, 2020

16.3K
Paw-Dragging: a Novel, Sensitive Analysis of the Mouse Cylinder Test
09:14

Paw-Dragging: a Novel, Sensitive Analysis of the Mouse Cylinder Test

Published on: April 29, 2015

25.2K

Area of Science:

  • Sports Science
  • Biomechanics
  • Swimming Performance

Background:

  • Understanding the relationship between coordination and drag is crucial for optimizing swimming technique.
  • Propulsive efficiency (ep) is a key factor in swimming performance, influenced by various biomechanical elements.

Purpose of the Study:

  • To investigate the relationship between the index of coordination (IdC) and active drag (D) in front crawl swimming.
  • To examine the correlation between IdC and propulsive efficiency (ep) at maximal swimming speeds.

Main Methods:

  • Twenty national swimmers performed incremental speed tests in front crawl using an active drag measurement system.
  • Data analysis involved regression models to assess the IdC-D relationship and correlation analysis for IdC-ep at maximal speed.

Main Results:

  • A significant linear relationship was found between IdC and active drag (IdC=0.246·D-27.06; R(2)=0.88).
  • Swimmers transitioned coordination modes around 1.55 m/s with approximately 110N of drag.
  • No significant correlation was observed between IdC and ep at maximal speed.

Conclusions:

  • Coordination plays a vital role in adapting propulsive forces to aquatic resistance at higher speeds.
  • Inter-individual analysis suggests unique optimization strategies for force and power generation among swimmers to achieve high speeds.