Jove
Visualize
Contact Us

Related Concept Videos

Muscle Stimulation Frequency01:22

Muscle Stimulation Frequency

2.6K
The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
2.6K

You might also read

Related Articles

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

Sort by
Same author

Blackcurrant Anthocyanin Supplementation Alters Exercise-Induced Substrate Utilization - A Systematic Review and Meta-Analysis.

Journal of dietary supplements·2026
Same author

New Zealand blackcurrant extract has no effect on physiological and cardiovascular responses during low-intensity sustained intermittent isometric contractions in men.

European journal of applied physiology·2025
Same author

Alterations of Exercise-Induced Carbohydrate and Fat Oxidation by Anthocyanin-Rich New Zealand Blackcurrant Are Associated with the Pre-Intervention Metabolic Function: A Secondary Analysis of Randomized Crossover Trials.

Nutrients·2025
Same author

Effects of New Zealand Black Currant Extract on Exercising Substrate Utilization and Postexercise Blood Pressure in Men and Women.

International journal of sport nutrition and exercise metabolism·2025
Same author

New Zealand Blackcurrant Increases Postexercise Hypotension Following Sustained Moderate-Intensity Exercise.

International journal of sport nutrition and exercise metabolism·2023
Same author

The Effects of Static Stretching Intensity on Range of Motion and Strength: A Systematic Review.

Journal of functional morphology and kinesiology·2023
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 Experiment Video

Updated: Sep 10, 2025

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity
08:40

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity

Published on: June 12, 2019

7.5K

Reliability of Standardised High-Intensity Static Stretching on the Hamstrings over Multiple Visits.

Joseph Bryant1, Darren J Cooper1, Derek M Peters2

  • 1School of Sport and Exercise Science, University of Worcester, Henwick Grove, Worcester WR2 6AJ, UK.

Muscles (Basel, Switzerland)
|August 22, 2025
PubMed
Summary
This summary is machine-generated.

High-intensity static stretching (SS) for hamstrings, applied at 120% of perceived discomfort, demonstrates good reliability for range of motion, strength, and passive stiffness across multiple lab sessions.

Keywords:
flexibilityintensityrange of motionvariability

More Related Videos

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

15.5K
Adapted Resistance Training Improves Strength in Eight Weeks in Individuals with Multiple Sclerosis
08:48

Adapted Resistance Training Improves Strength in Eight Weeks in Individuals with Multiple Sclerosis

Published on: January 29, 2016

16.9K

Related Experiment Videos

Last Updated: Sep 10, 2025

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity
08:40

Isokinetic Robotic Device to Improve Test-Retest and Inter-Rater Reliability for Stretch Reflex Measurements in Stroke Patients with Spasticity

Published on: June 12, 2019

7.5K
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

15.5K
Adapted Resistance Training Improves Strength in Eight Weeks in Individuals with Multiple Sclerosis
08:48

Adapted Resistance Training Improves Strength in Eight Weeks in Individuals with Multiple Sclerosis

Published on: January 29, 2016

16.9K

Area of Science:

  • Sports Medicine
  • Biomechanics
  • Exercise Physiology

Background:

  • Static stretching (SS) is a common practice in athletic training.
  • Recent research explores the impact of SS intensity on range of motion (ROM), strength, and passive stiffness.
  • The reliability of high-intensity SS across repeated testing sessions remains under-investigated.

Purpose of the Study:

  • To assess the reliability of high-intensity static stretching (SS) of the hamstrings.
  • To evaluate the consistency of measurements for ROM, strength, power, and passive stiffness across five laboratory visits.
  • To determine if high-intensity SS protocols are reproducible in a controlled setting.

Main Methods:

  • Thirteen physically active males participated in five laboratory testing sessions.
  • High-intensity SS involved a 30-second stretch at 120% of the point of discomfort (POD).
  • Measurements were taken using an isokinetic dynamometer to assess ROM, strength, power, and passive stiffness.

Main Results:

  • Good reliability (intraclass correlation coefficient > 0.80) was found for knee extension ROM, knee flexion strength, and passive stiffness.
  • No significant differences were observed in the ROM achieved at the POD across the five testing sessions (p = 0.370).
  • These results indicate consistency in the measured outcomes under the tested high-intensity SS protocol.

Conclusions:

  • High-intensity static stretching (SS) to 120% of the point of discomfort, when performed on an isokinetic dynamometer, is reliable across multiple laboratory sessions.
  • The protocol shows consistent effects on hamstring range of motion, strength, and passive stiffness.
  • Further research is needed to determine the reliability of high-intensity SS in applied, real-world athletic scenarios.