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

Cross-bridge Cycle01:26

Cross-bridge Cycle

108.8K
As muscle contracts, the overlap between the thin and thick filaments increases, decreasing the length of the sarcomere—the contractile unit of the muscle—using energy in the form of ATP. At the molecular level, this is a cyclic, multistep process that involves binding and hydrolysis of ATP, and movement of actin by myosin.
108.8K
The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

3.6K
Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...
3.6K
Bone Disorders01:29

Bone Disorders

8.0K
Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
8.0K
Relaxation of Skeletal Muscles01:29

Relaxation of Skeletal Muscles

9.6K
The period of muscle contraction primarily influences the duration of stimulation at the neuromuscular junction (NMJ), the presence of free calcium ions in the sarcoplasm, and the availability of energy or ATP to support contractions.
When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated sodium channels. Sodium ions enter the cell, further depolarizing the presynaptic membrane. This depolarization causes voltage-gated calcium channels to open....
9.6K
Muscle Recovery and Fatigue01:24

Muscle Recovery and Fatigue

4.4K
Muscle fatigue refers to the decline in a muscle's ability to maintain the force of contraction after prolonged activity. It primarily stems from changes within muscle fibers. Even before experiencing muscle fatigue, one may feel tired and have the urge to stop the activity. This response, known as central fatigue, occurs due to changes in the central nervous system, namely the brain and spinal cord. While there is no single mechanism that induces fatigue, it may serve as a protective...
4.4K
Exercise and Cardiovascular Response01:20

Exercise and Cardiovascular Response

6.7K
Exercise significantly impacts cardiovascular response, which is crucial for understanding patient health and designing effective treatment plans.
Light to moderate physical activity initiates a series of interconnected responses in the body. The heart rate modestly increases in anticipation of the workout, followed by widespread vasodilation as oxygen consumption by skeletal muscles increases. This results in decreased peripheral resistance, increased capillary blood flow, and accelerated...
6.7K

You might also read

Related Articles

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

Sort by
Same author

[Research on electrical impedance tomography for pediatric pneumonia based on an improved radial basis function neural network].

Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi·2026
Same author

Jasmonic acid and PpeMYC2 regulate peach fruit ripening by controlling polyamine levels and anthocyanin biosynthesis.

Plant physiology·2026
Same author

Multiobjective blood pump impeller optimization with three response surface methods and prototype stator casting for an integrated motor pump.

Scientific reports·2026
Same author

LncRNA7503 decreases peach (Prunus persica) branch number and angle by inducing pre-miR395a degradation and reducing bioactive BR content.

Molecular horticulture·2026
Same author

PpBRC1 negatively regulates branching via modulating GA signal transduction gene PpGID1b in peach (Prunus persica).

Plant cell reports·2026
Same author

Patient-specific CFD evaluation of his angle and stoma caliber in stomach-partitioning gastrojejunostomy.

Computer methods in biomechanics and biomedical engineering·2026

Related Experiment Video

Updated: May 4, 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

13.7K

Muscle Activation Reduction During Walking with an Active Hip Exoskeleton.

Wentao Sheng1, Farzan Ghalichi2, Li Ding1

  • 1School of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213001, China.

Biomimetics (Basel, Switzerland)
|January 24, 2025
PubMed
Summary
This summary is machine-generated.

Optimizing active hip exoskeleton assistance timing reduces hip muscle activation and energy use during walking. This strategy improves functional assistance by aligning with natural muscle activation patterns.

Keywords:
active assisthip exoskeletonhuman–machine interactionmuscle activationoxygen consumption

More Related Videos

Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis
08:08

Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis

Published on: May 8, 2014

16.7K
Training Persons with Spinal Cord Injury to Ambulate Using a Powered Exoskeleton
09:46

Training Persons with Spinal Cord Injury to Ambulate Using a Powered Exoskeleton

Published on: June 16, 2016

20.6K

Related Experiment Videos

Last Updated: May 4, 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

13.7K
Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis
08:08

Oscillation and Reaction Board Techniques for Estimating Inertial Properties of a Below-knee Prosthesis

Published on: May 8, 2014

16.7K
Training Persons with Spinal Cord Injury to Ambulate Using a Powered Exoskeleton
09:46

Training Persons with Spinal Cord Injury to Ambulate Using a Powered Exoskeleton

Published on: June 16, 2016

20.6K

Area of Science:

  • Biomechanics
  • Robotics
  • Human movement science

Background:

  • Limited research exists on optimizing active hip exoskeleton assistance timing based on muscle activation.
  • Understanding muscle activation patterns is crucial for effective exoskeleton design.

Purpose of the Study:

  • To reduce hip joint muscles' activation during walking using an active hip exoskeleton.
  • To determine the optimal timing for active assistance from a hip exoskeleton.

Main Methods:

  • Sixteen healthy adults participated in walking trials with varying exoskeleton loading and assistance.
  • Surface electromyography (sEMG) measured muscle activation.
  • Oxygen consumption was assessed to evaluate metabolic cost.

Main Results:

  • Assistance during the 9-60% gait cycle phase resulted in significantly lower muscle activation and metabolic cost compared to all-gait-cycle assistance.
  • The proposed active assistance strategy demonstrated effectiveness in reducing physiological load.

Conclusions:

  • Timing active hip exoskeleton assistance according to muscle activation characteristics enhances functional assistance.
  • Personalized or optimized assistance timing can improve the efficiency and user experience of wearable robotic devices.