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

Machines: Problem Solving II01:30

Machines: Problem Solving II

731
Machines are complex structures consisting of movable, pin-connected multi-force members that work together to transmit forces. Consider a lifting tong carrying a 100 kg load. It comprises movable sections DAF and CBG linked together with member AB.
731
Residual Stresses01:26

Residual Stresses

796
Residual stresses reside in a structure even after removing the original stress inducer. This phenomenon often arises from varied plastic deformations across different parts of a structure. Consider a rod stretched beyond its yield point. It will not regain its original length due to permanent deformation. Even after load removal, the rod does not entirely lose stress because of uneven plastic deformations, resulting in residual stresses. The computation of these stresses in structures is...
796
Power Expended by a Constant Force00:57

Power Expended by a Constant Force

9.3K
The relationship between work done and the time taken to do it can be explained using the concept of power. For example, several sprinters in a race may have the same velocity when they reach the finish line, therefore doing the same amount of work, but the winner does it in the least amount of time. Thus, power is defined as the rate of doing work. Since work can vary as a function of time, the average power is defined as the work done during a time interval, divided by the time interval.
9.3K
Exercise and Muscle Performance01:27

Exercise and Muscle Performance

3.0K
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...
3.0K
Upward Impending Motion01:21

Upward Impending Motion

642
A square-threaded screw jack is a mechanical device widely used for lifting heavy loads or applying considerable force. Its operation is based on converting the force applied at its handle into a torsional moment, causing the upward impending motion of the screw. This movement is accomplished by overcoming the static friction between the threads of the screw and the jack.
To better comprehend how a screw jack functions, consider the completely unraveled thread as a block in contact with the...
642
Rolling Resistance: Problem Solving01:17

Rolling Resistance: Problem Solving

917
Rolling resistance, also known as rolling friction, is the force that resists the motion of a rolling object, such as a wheel, tire, or ball, when it moves over a surface. It is caused by the deformation of the object and the surface in contact with each other, as well as other factors like internal friction, hysteresis, and energy losses within the materials. Rolling resistance opposes the object's motion, requiring additional energy to overcome it and maintain movement. In practical...
917

You might also read

Related Articles

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

Sort by
Same author

Form follows force: Activation-dependent, 3D ultrasound-imaging-based analysis of human tibialis anterior's muscle architecture.

Journal of the mechanical behavior of biomedical materials·2026
Same author

Aponeurosis shape change as an indirect indicator for the force transmission mechanics in pennate muscles-A pilot study.

Journal of the mechanical behavior of biomedical materials·2026
Same author

Biaxial determination of active and passive mechanical properties of porcine stomach smooth muscle tissue.

Journal of the mechanical behavior of biomedical materials·2026
Same author

Targeting Mitochondrial Dysfunction With Elamipretide (SS-31) Improves Skeletal Muscle Performance in a HFpEF Rat Model.

Circulation. Heart failure·2026
Same author

Effects of chemical myosin II cross-bridge inhibitors on eccentric force production in skinned muscle fibres.

Experimental physiology·2026
Same author

Effects of an active exoskeleton on the muscle activity of the erector spinae and biceps femoris muscles during lifting with symmetric stoop and squat technique.

Frontiers in bioengineering and biotechnology·2026

Related Experiment Video

Updated: Mar 20, 2026

Quantifying Arms and Legs Contributions during Repetitive Electrically-Assisted Sit-To-Stand Exercise in Paraplegics: A Pilot Study
08:40

Quantifying Arms and Legs Contributions during Repetitive Electrically-Assisted Sit-To-Stand Exercise in Paraplegics: A Pilot Study

Published on: November 11, 2022

1.5K

Does weightlifting increase residual force enhancement?

Tobias Siebert1, David Kurch2, Reinhard Blickhan3

  • 1Institute of Sport and Motion Science, University of Stuttgart, Stuttgart, Germany.

Journal of Biomechanics
|May 29, 2016
PubMed
Summary

Weightlifters do not show significantly different residual force enhancement (RFE) compared to a reference group. However, RFE tends to decrease slower in weightlifters, suggesting minor training influence.

Keywords:
AdaptationEccentric muscle contractionMulti-joint leg extensionTraining

More Related Videos

Mimicking a Space Mission to Mars Using Hindlimb Unloading and Partial Weight Bearing in Rats
05:54

Mimicking a Space Mission to Mars Using Hindlimb Unloading and Partial Weight Bearing in Rats

Published on: April 4, 2019

11.5K
A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance
07:19

A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance

Published on: March 19, 2020

6.4K

Related Experiment Videos

Last Updated: Mar 20, 2026

Quantifying Arms and Legs Contributions during Repetitive Electrically-Assisted Sit-To-Stand Exercise in Paraplegics: A Pilot Study
08:40

Quantifying Arms and Legs Contributions during Repetitive Electrically-Assisted Sit-To-Stand Exercise in Paraplegics: A Pilot Study

Published on: November 11, 2022

1.5K
Mimicking a Space Mission to Mars Using Hindlimb Unloading and Partial Weight Bearing in Rats
05:54

Mimicking a Space Mission to Mars Using Hindlimb Unloading and Partial Weight Bearing in Rats

Published on: April 4, 2019

11.5K
A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance
07:19

A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance

Published on: March 19, 2020

6.4K

Area of Science:

  • Biomechanics
  • Exercise Physiology
  • Muscle Physiology

Background:

  • Residual force enhancement (RFE) is the phenomenon where active muscle force after stretching exceeds isometric force at the same length.
  • RFE varies across different muscles, and its modulation by training remains largely unexplored.
  • Weightlifting involves extensive eccentric contractions, making RFE potentially relevant for performance.

Purpose of the Study:

  • To investigate whether long-term weightlifting training alters residual force enhancement (RFE).
  • To compare RFE in a group of weightlifters against a non-athletic reference group.

Main Methods:

  • External reaction forces were measured during multi-joint leg extensions using a motor-driven leg press dynamometer (ISOMED 2000).
  • Steady-state isometric forces post-stretching were compared to isometric reference contractions.
  • Participants included 10 weightlifters and 11 individuals in a reference group.

Main Results:

  • Significant RFE was observed in both weightlifters and the reference group (p<0.001).
  • No statistically significant differences in RFE were found between the two groups (p=0.320).
  • A trend indicated that RFE decreased more slowly in the weightlifting group compared to the reference group.

Conclusions:

  • Long-term weightlifting training appears to have a minimal impact on residual force enhancement (RFE).
  • The study speculates that the combination of eccentric and concentric exercises in weightlifting may lead to negligible changes in titin-isoform expression, a potential contributor to RFE.