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

Design Example: Designing Water Slide01:18

Design Example: Designing Water Slide

792
When designing a water slide, controlling the speed of water flow is crucial for rider safety while maintaining an exciting experience. As water flows down the slide, gravity causes it to accelerate, with its speed at the bottom depending on the height from which it starts. The higher the slide, the more potential energy the water has at the top, which is converted into kinetic energy as it descends, increasing its speed.
Bernoulli's principle determines the water's velocity along the slide....
792
Higher Derivatives01:29

Higher Derivatives

333
In calculus, higher-order derivatives extend the idea of differentiation beyond the first derivative to capture successive rates of change. These derivatives provide detailed information about the behavior of functions and have important applications in both mathematics and physics. To illustrate these concepts, consider the example function\begin{equation*}f(x) = x^3 - x\end{equation*}which serves as a useful case study for exploring higher derivatives.The first derivative represents the slope...
333
Derivatives of Simple Functions01:27

Derivatives of Simple Functions

476
Derivatives quantify the rate of change of a function and can be interpreted geometrically as the slope of a straight line or the slope of a tangent line to a curve at a given point. In the context of a roller coaster, the derivative of the function describing the track’s horizontal position provides a mathematical description of how steep the path is at any location along the ride.Constant and Linear PathsA horizontal segment of a roller coaster can be modeled by a constant function,...
476
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
Dynamics Of Circular Motion: Applications01:17

Dynamics Of Circular Motion: Applications

7.7K
Suppose a car moves on flat ground and turns to the left. The centripetal force causing the car to turn in a circular path is due to friction between the tires and the road. For this, a minimum coefficient of friction is needed, or the car will move in a larger-radius curve and leave the roadway. Let's now consider banked curves, where the slope of the road helps in negotiating the curve. The greater the angle of the curve, the faster one can take the curve. It is common for race tracks for...
7.7K
Decreasing Function01:27

Decreasing Function

445
A decreasing function describes a relationship where the output consistently declines as the input increases. This means that for any two input values, if one is greater than the other, the corresponding output is smaller. Mathematically, a function f is decreasing on an interval I if for every x1 < x2​ in I, f (x1) > f (x2). This type of behavior is visually identified on a graph that slopes downward from left to right.The nature of a function can be analyzed by calculating...
445

You might also read

Related Articles

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

Sort by
Same author

Exercise and Kidney Function in Care of Older Adults.

Journal of the American Society of Nephrology : JASN·2025
Same author

Body Composition and Intradialytic Exercise in Kidney Disease: A Combined Analysis of the PEDAL and CYCLE-HD Randomised Controlled Trials.

Journal of cachexia, sarcopenia and muscle·2025
Same author

A structured, home-based exercise programme in kidney transplant recipients (ECSERT): A randomised controlled feasibility study.

PloS one·2025
Same author

Can exercise reduce fatigue in people living with kidney disease?

Current opinion in clinical nutrition and metabolic care·2025
Same author

Cost-effectiveness of bioimpedance-guided fluid management in patients undergoing haemodialysis: the BISTRO RCT.

Health technology assessment (Winchester, England)·2024
Same author

Measuring emotional contagion as a multidimensional construct: the development and initial validation of the contagion of affective phenomena scales.

The Journal of social psychology·2024
Same journal

Continental Performance Profiles in Elite Youth Football: A Multidimensional Analysis of Physical, Technical-Tactical, Spatial, and Passing Network Performance Across U-17 and U-20 World Cups.

International journal of sports physiology and performance·2026
Same journal

Understanding the Long Game: From Promising Youth to Olympic Champion.

International journal of sports physiology and performance·2026
Same journal

No Additional Effects of Block- Compared to Even-Periodization of Low-Intensity Training in Junior Cross-Country Skiers.

International journal of sports physiology and performance·2026
Same journal

Seasonal Associations Between Isometric Strength and Dynamic Performance in Elite Youth Soccer Players.

International journal of sports physiology and performance·2026
Same journal

Ovarian Sex Hormones and Substrate Oxidation During a High-Intensity Interval Exercise: A Comparative Analysis Across Distinct Phases of Females' Hormonal Profiles.

International journal of sports physiology and performance·2026
Same journal

Sleep Knowledge, Attitudes, and Behaviors of Professional Male Rugby League Athletes: Does Knowledge Translate Into Practice?

International journal of sports physiology and performance·2026
See all related articles

Related Experiment Video

Updated: Apr 27, 2026

Biomechanical Analysis Methods to Assess Professional Badminton Players' Lunge Performance
06:36

Biomechanical Analysis Methods to Assess Professional Badminton Players' Lunge Performance

Published on: June 11, 2019

10.1K

Characteristics explaining performance in downhill mountain biking.

Joel B Chidley1, Alexandra L MacGregor, Caoimhe Martin

  • 1School of Sport and Exercise Sciences, University of Kent, Kent UK.

International Journal of Sports Physiology and Performance
|July 11, 2014
PubMed
Summary
This summary is machine-generated.

Rider skill, handgrip endurance, self-confidence, and aerobic capacity are key to downhill mountain biking performance. Coaches can use these findings to improve training and talent identification for DH racers.

More Related Videos

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

7.5K
Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings
06:21

Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings

Published on: July 26, 2022

2.3K

Related Experiment Videos

Last Updated: Apr 27, 2026

Biomechanical Analysis Methods to Assess Professional Badminton Players' Lunge Performance
06:36

Biomechanical Analysis Methods to Assess Professional Badminton Players' Lunge Performance

Published on: June 11, 2019

10.1K
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

7.5K
Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings
06:21

Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings

Published on: July 26, 2022

2.3K

Area of Science:

  • Sports Science
  • Biomechanics
  • Exercise Physiology

Background:

  • Downhill (DH) mountain biking demands a complex interplay of physical, mental, and technical abilities.
  • Identifying the specific factors that contribute to elite DH performance is crucial for optimizing training and athlete development.

Purpose of the Study:

  • To identify key physiological, psychological, and skill-based characteristics that predict performance in downhill mountain biking.
  • To develop and validate a reliable measure of rider skill in DH mountain biking.

Main Methods:

  • A multi-study approach was employed, including expert focus groups, video analysis for skill assessment, and competition-based evaluations.
  • Physiological (aerobic capacity, anaerobic power, handgrip endurance) and psychological (self-confidence) variables were measured alongside rider skill.

Main Results:

  • Rider skill emerged as the most significant predictor of DH performance, followed by handgrip endurance, self-confidence, and aerobic capacity.
  • Objective measures confirmed the importance of aerobic capacity, with riders operating significantly above their first ventilatory threshold during races.
  • The developed rider-skill assessment demonstrated good reliability among expert judges.

Conclusions:

  • Rider skill, handgrip endurance, self-confidence, and aerobic capacity are critical determinants of success in DH mountain biking.
  • The study offers a validated rider-skill assessment tool for coaches to monitor training and identify potential talent.
  • Targeted interventions focusing on enhancing self-confidence and aerobic capacity can improve DH racing outcomes.