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

Dynamic Modulus of Elasticity of Concrete01:16

Dynamic Modulus of Elasticity of Concrete

The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...

You might also read

Related Articles

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

Sort by
Same author

How Changes in Muscle Activity and Range of Motion Represent User Perceptions of Back-support Exoskeleton Performance.

IEEE transactions on neural systems and rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society·2026
Same author

A Novel Approach to Assessing Ice Skating Sprint Performance Using Wearable Sensors.

Annals of biomedical engineering·2026
Same author

Insights from In-Field Applications of Back-Support Exoskeletons in the Construction Industry: Opportunities, Challenges, and Future Directions.

IISE transactions on occupational ergonomics and human factors·2026
Same author

Assessment of a Passive Exoskeleton for Neck and Lower Back Support: A Task Study on Muscle Activity and User Perceived Exertion.

Sensors (Basel, Switzerland)·2026
Same author

Kinematic design of linkage-based haptic interfaces for medical applications: a review.

Progress in biomedical engineering (Bristol, England)·2025
Same author

Perceived fatigue progression tracking during manual handling tasks using sEMG recordings.

Journal of neuroengineering and rehabilitation·2025

Related Experiment Video

Updated: Jun 30, 2026

Methods to Quantify Pharmacologically Induced Alterations in Motor Function in Human Incomplete SCI
14:55

Methods to Quantify Pharmacologically Induced Alterations in Motor Function in Human Incomplete SCI

Published on: April 18, 2011

13.8K

A Dynamic Procedure to Detect Maximum Voluntary Contractions in Low Back.

Xun Wang1, Karla Beltran Martinez1, Ali Golabchi2,3

  • 1Department of Mechanical Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada.

Sensors (Basel, Switzerland)
|June 10, 2023
PubMed
Summary

A new dynamic maximum voluntary contraction (MVC) method for low back muscles provides more accurate surface electromyography (sEMG) normalization. This dynamic MVC procedure captures higher muscle activity, improving data consistency across individuals and trials.

Keywords:
MVCergonomic risklow back musclessurface electromyographytrunk bending

More Related Videos

Assessment of Neuromuscular Function Using Percutaneous Electrical Nerve Stimulation
07:53

Assessment of Neuromuscular Function Using Percutaneous Electrical Nerve Stimulation

Published on: September 13, 2015

22.0K
Muscle Function Obtained with Motion Mode Ultrasound and Surface Electromyography during Core Endurance Exercise
09:21

Muscle Function Obtained with Motion Mode Ultrasound and Surface Electromyography during Core Endurance Exercise

Published on: August 25, 2022

3.3K

Related Experiment Videos

Last Updated: Jun 30, 2026

Methods to Quantify Pharmacologically Induced Alterations in Motor Function in Human Incomplete SCI
14:55

Methods to Quantify Pharmacologically Induced Alterations in Motor Function in Human Incomplete SCI

Published on: April 18, 2011

13.8K
Assessment of Neuromuscular Function Using Percutaneous Electrical Nerve Stimulation
07:53

Assessment of Neuromuscular Function Using Percutaneous Electrical Nerve Stimulation

Published on: September 13, 2015

22.0K
Muscle Function Obtained with Motion Mode Ultrasound and Surface Electromyography during Core Endurance Exercise
09:21

Muscle Function Obtained with Motion Mode Ultrasound and Surface Electromyography during Core Endurance Exercise

Published on: August 25, 2022

3.3K

Area of Science:

  • Biomechanics
  • Human Physiology
  • Motor Control

Background:

  • Surface electromyography (sEMG) measures muscle activity but is sensitive to individual variations and trial inconsistencies.
  • Maximum voluntary contraction (MVC) is crucial for normalizing sEMG data for reliable comparisons.
  • Conventional MVC methods may underestimate the true maximum activity of low back muscles.

Purpose of the Study:

  • To introduce and validate a novel dynamic MVC measurement procedure specifically for low back muscles.
  • To address the limitation of conventional MVC in capturing the full sEMG amplitude of the low back.
  • To enhance the accuracy and consistency of sEMG normalization in low back muscle research.

Main Methods:

  • Developed a weightlifting-inspired dynamic MVC protocol for low back muscles.
  • Recruited 10 healthy participants for data collection.
  • Compared sEMG normalization using the proposed dynamic MVC against conventional MVC methods.

Main Results:

  • The dynamic MVC procedure yielded significantly lower normalized sEMG values (p < 0.05).
  • This indicates that the dynamic MVC captured a higher sEMG amplitude compared to conventional methods.
  • Normalized sEMG data using the dynamic MVC were closer to the physiological maximum.

Conclusions:

  • The proposed dynamic MVC procedure is superior for normalizing low back muscle sEMG.
  • This method offers a more accurate representation of muscle activation.
  • Improved normalization enhances the reliability of sEMG analysis in low back studies.