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

Lift01:23

Lift

533
Lift is a fundamental aerodynamic force that acts perpendicular to the direction of airflow. It plays a central role in achieving and sustaining flight and in stabilizing various vehicles. Lift primarily originates from pressure differences created across surfaces, such as an airfoil. A lower pressure region forms above the wing, while a higher pressure region forms below it, generating an upward force. This differential results from the shape and orientation of the airfoil, enabling the wing...
533
Kinetic Energy00:23

Kinetic Energy

43.4K
Kinetic energy is the ability of an object in motion to do work or enact change. It can take on many forms. For instance, water flowing down a waterfall has kinetic energy. In biological systems, particles of light travel and are absorbed by plants to create chemical energy. Animals consume the chemical energy and give off molecules that carry their scent through the air. They also generate kinetic energy when they run away from predators. Entire systems also possess kinetic energy, like the...
43.4K
Enzyme Kinetics01:19

Enzyme Kinetics

104.1K
Enzymes speed up reactions by lowering the activation energy of the reactants. The speed at which the enzyme turns reactants into products is called the rate of reaction. Several factors impact the rate of reaction, including the number of available reactants. Enzyme kinetics is the study of how an enzyme changes the rate of a reaction.
Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...
104.1K
Kinetic Molecular Theory: Molecular Velocities, Temperature, and Kinetic Energy03:07

Kinetic Molecular Theory: Molecular Velocities, Temperature, and Kinetic Energy

29.9K
The kinetic molecular theory qualitatively explains the behaviors described by the various gas laws. The postulates of this theory may be applied in a more quantitative fashion to derive these individual laws.
29.9K
Structural Joints: Synovial Joints01:16

Structural Joints: Synovial Joints

6.8K
Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...
6.8K
Structural Joints: Fibrous Joints01:03

Structural Joints: Fibrous Joints

3.8K
Fibrous joints are a type of joint where the bones are connected by fibrous connective tissue. These joints provide stability and minimal to no movement between the articulating bones. There are three types of fibrous joints.
Suture
All the bones of the skull, except for the mandible, are joined to each other by a fibrous joint called a suture. The fibrous connective tissue found at a suture strongly unites the adjacent skull bones and thus helps to protect the brain and form the face. In...
3.8K

You might also read

Related Articles

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

Sort by
Same author

Corrigendum to "Obesity as a moderator of lumbar spine posture change during pregnancy" [Gait Posture 122 (2025) 320-325].

Gait & posture·2025
Same author

Obesity as a moderator of lumber spine posture change during pregnancy.

Gait & posture·2025
Same author

Low back demands from assisting a patient with an unexpected loss of balance.

Clinical biomechanics (Bristol, Avon)·2025
Same author

Effect of Hand Grip and Center of Mass Location on Muscle Activity While Manipulating a Surgical Table Segment.

IISE transactions on occupational ergonomics and human factors·2024
Same author

Musculoskeletal models determine the effect of a soft active exosuit on muscle activations and forces during lifting and lowering tasks.

Journal of biomechanics·2024
Same author

An OpenSim thoracolumbar spine model applying a bottom-up modelling approach is similar to a top-down approach.

Journal of biomechanics·2024

Related Experiment Video

Updated: Feb 2, 2026

In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint
07:09

In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint

Published on: March 7, 2014

13.8K

Are psychophysically chosen lifting loads based on joint kinetics?

Jacob J Banks1, Graham E Caldwell1

  • 1University of Massachusetts, Department of Kinesiology, Amherst, MA, 01003, USA.

Applied Ergonomics
|November 30, 2018
PubMed
Summary

Maximal acceptable weight limits (MAWL) may be based on perceived joint stress during lifting tasks. This study used biomechanical modeling to analyze lifting loads and joint demands, finding consistent loading patterns relative to MAWL.

Keywords:
Limiting jointLink-segment modelManual materials handlingPsychophysics

More Related Videos

Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions
07:09

Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions

Published on: May 2, 2019

6.5K
Psychophysical Tracking Method to Measure Taste Preferences in Children and Adults
09:17

Psychophysical Tracking Method to Measure Taste Preferences in Children and Adults

Published on: July 16, 2016

18.2K

Related Experiment Videos

Last Updated: Feb 2, 2026

In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint
07:09

In situ Compressive Loading and Correlative Noninvasive Imaging of the Bone-periodontal Ligament-tooth Fibrous Joint

Published on: March 7, 2014

13.8K
Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions
07:09

Integrating Visual Psychophysical Assays within a Y-Maze to Isolate the Role that Visual Features Play in Navigational Decisions

Published on: May 2, 2019

6.5K
Psychophysical Tracking Method to Measure Taste Preferences in Children and Adults
09:17

Psychophysical Tracking Method to Measure Taste Preferences in Children and Adults

Published on: July 16, 2016

18.2K

Area of Science:

  • Biomechanics
  • Occupational Health
  • Ergonomics

Background:

  • Maximal acceptable weight limits (MAWL) guide safe lifting but lack rationale for load selection.
  • Limited research connects MAWL to full-body joint biomechanical demands.

Purpose of the Study:

  • To investigate the relationship between MAWL and biomechanical joint demands during repetitive lifting.
  • To explore the rationale behind MAWL selection in relation to specific lifting postures and loads.

Main Methods:

  • Link-segment biomechanical modeling was employed for 18 participants performing repetitive sagittal lifts.
  • Participants performed lifts at self-selected MAWL levels, with kinematics and kinetics analyzed.

Main Results:

  • Each lift generated unique kinematics, kinetics, and joint stress patterns.
  • Lower starting positions maximally stressed the L5/S1 joint, while upright postures stressed the shoulder.
  • Normalized peak moments at the most stressed joint were consistently around 70-75% of the joint's maximum capacity across different MAWL loads.

Conclusions:

  • MAWL selection appears to be influenced by the perception of stress on the most heavily loaded joint for a given lifting task.
  • Findings suggest MAWLs may reflect an individual's tolerance limit for specific biomechanical joint demands.