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

Exercise and Muscle Performance01:27

Exercise and Muscle Performance

6.1K
Exercise induces a range of adaptations in muscle tissue, depending on the type and duration of activity. Such physical training can be broadly categorized into two types: endurance exercises and resistance exercises.
Endurance exercises
Endurance exercises involve running, swimming, or cycling, which require repetitive movements with low force output. When a person engages in endurance exercise, a few noticeable changes occur in their skeletal muscles. For instance, the number of capillaries...
6.1K
Impact: Problem Solving01:26

Impact: Problem Solving

612
In an experiment conducted during a Mars mission, a rover propels a projectile with an initial velocity, and the projectile rebounds after colliding with the Martian surface. To ascertain the maximum height attained by the projectile after this collision, the known restitution coefficient and acceleration due to gravity are employed.
By designating the launch point as the origin and utilizing kinematic equations, the vertical component of the projectile's velocity at the point of impact is...
612
Lung Capacity01:47

Lung Capacity

44.1K
The air in the lungs is measured in volumes and capacities. Lung volume measures reflect the amount of air taken in, released, or left over after a lung function, like a single inhalation. Lung capacity measures are sums of two or more lung volume measures.
44.1K
Excitation-Contraction Coupling in Skeletal Muscles01:20

Excitation-Contraction Coupling in Skeletal Muscles

17.7K
Excitation-contraction coupling is a series of events that occur between generating an action potential and initiating a muscle contraction. It occurs at the triad, a structure found in skeletal muscle fibers that comprise a T-tubule and terminal cisternae of the sarcoplasmic reticulum on each side. These triads are visible in longitudinally sectioned muscle fibers. They are typically located at the A-I junction — the junction between the A and I bands of the sarcomere.
When an action...
17.7K
Mechanism of Breathing III: The Accessory Muscles01:21

Mechanism of Breathing III: The Accessory Muscles

5.2K
The Role of Accessory Muscles in the Respiratory System
The respiratory system is a complex network that relies on primary respiratory muscles like the diaphragm, but also involves accessory muscles to enhance lung expansion and airflow during both inhalation and exhalation.
Enhancing Inhalation with Accessory Muscles:
Accessory muscles such as the sternocleidomastoid, scalene, intercostal, and abdominal muscles are crucial when additional respiratory effort is required, such as during deep...
5.2K
Long-term Potentiation01:25

Long-term Potentiation

2.7K
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
LTP can occur when...
2.7K

You might also read

Related Articles

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

Sort by
Same author

A comparative analysis estimating aspergillosis and histoplasmosis encounters among inpatients in the United States using multi-regional electronic health record and National Discharge Data, 2014-2020.

AJE advances : research in epidemiology·2026
Same author

A Preliminary Study of a Machine Learning Prediction of Poorly Differentiated Hepatocellular Carcinoma Based on a Comprehensive Parameter Analysis Using Dual-Energy Computed Tomography.

Journal of computer assisted tomography·2026
Same author

Epidemiology of Aspergillosis Diagnoses in US Adults Using a National EHR Database, 2013-2023.

Open forum infectious diseases·2026
Same author

An open-source application for self-service, Health Insurance and Portability Accountability Act-compliant geocoding.

Journal of clinical and translational science·2026
Same author

Effect of rotational forces on the durability of dental materials: implications in biology and anthropology.

Journal of the Royal Society, Interface·2026
Same author

Updating the Epidemiology of Blastomycosis and Histoplasmosis in the United States, Using National Electronic Health Record Data, 2013-2023.

The Journal of infectious diseases·2025

Related Experiment Video

Updated: Apr 24, 2026

Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations
07:30

Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations

Published on: May 1, 2018

14.8K

Relationships between explosive and maximal triple extensor muscle performance and vertical jump height.

Eunwook Chang1, Marc F Norcross, Sam T Johnson

  • 11School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, Oregon; and 2Sports Medicine, Department of Athletics, University of San Francisco, San Francisco, California.

Journal of Strength and Conditioning Research
|September 5, 2014
PubMed
Summary

Improving knee and ankle extension rate of torque development (RTD), particularly in the initial contraction phase, is key for enhancing vertical jump height. This study found early RTD to be more influential than peak torque for jump performance.

More Related Videos

Importance of Jumping Ability in Handball Throwing Speed and Accuracy
02:43

Importance of Jumping Ability in Handball Throwing Speed and Accuracy

Published on: April 4, 2025

1.7K
Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players
10:08

Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players

Published on: June 10, 2025

1.7K

Related Experiment Videos

Last Updated: Apr 24, 2026

Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations
07:30

Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations

Published on: May 1, 2018

14.8K
Importance of Jumping Ability in Handball Throwing Speed and Accuracy
02:43

Importance of Jumping Ability in Handball Throwing Speed and Accuracy

Published on: April 4, 2025

1.7K
Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players
10:08

Effects of a Novel Neuromuscular Training Intervention on Jump, Sprint, and Change of Direction in Adult Female Soccer Players

Published on: June 10, 2025

1.7K

Area of Science:

  • Biomechanics
  • Sports Science
  • Human Movement

Background:

  • The vertical jump is a fundamental measure of explosive power in sports.
  • Understanding the neuromuscular factors influencing vertical jump height is crucial for performance optimization.
  • Rate of torque development (RTD) and peak torque (PT) are key indicators of muscle power.

Purpose of the Study:

  • To investigate the relationship between maximal vertical jump height and measures of torque production (RTD and PT) in hip, knee, and ankle extensors.
  • To determine which specific muscle groups and torque characteristics (early vs. late RTD, PT) are most predictive of vertical jump performance.

Main Methods:

  • Thirty recreationally active individuals participated in the study.
  • Maximal isometric voluntary contractions (MVIC) of hip, knee, and ankle extensors were recorded.
  • Rate of torque development (RTD) was calculated at 0-50 ms (RTD50) and 0-200 ms (RTD200) post-onset.
  • Peak torque (PT) was identified for each muscle group.
  • Participants performed a countermovement vertical jump to measure maximal height.

Main Results:

  • Greater vertical jump height was significantly associated with higher knee and ankle extensor RTD50, RTD200, and PT.
  • Hip extensor torque characteristics (RTD50, RTD200, PT) did not show a significant relationship with vertical jump height.
  • Knee extensor RTD50 explained 47.6% of the variance in vertical jump height, followed by ankle extensor RTD50 (32.5%).
  • Early phase RTD (RTD50) was more strongly related to vertical jump performance than later phase RTD (RTD200) or PT for knee and ankle extensors.

Conclusions:

  • Knee and ankle extensors play a critical role in determining maximal vertical jump performance.
  • The rate of torque development, especially during the initial 50 milliseconds of contraction (RTD50), is a more significant predictor than peak torque.
  • Targeted training interventions aimed at improving early-phase knee and ankle extensor torque production may enhance vertical jump capabilities.