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

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
Energy Supply for Muscle Contraction01:25

Energy Supply for Muscle Contraction

5.3K
Skeletal muscle fibers have the unique ability to switch between rest and contraction states, using different sources of ATP for energy. The contraction cycle and Ca2+ transport back into the sarcoplasmic reticulum for relaxation require significant ATP. However, the ATP reserves in muscle fibers are limited and can only sustain contractions for a few seconds. Additional ATP production becomes necessary for prolonged contractions. As a result, muscle fibers generate ATP through various sources,...
5.3K
Metabolic States of the Body: Fasting and Starvation01:24

Metabolic States of the Body: Fasting and Starvation

2.8K
During the initial hours of fasting, the body uses up its glycogen stores as an energy source. Once these glycogen reserves are depleted, the body begins breaking down stored triglycerides and structural proteins. During this stage, glycerol becomes a key substrate for gluconeogenesis, while free fatty acids undergo beta-oxidation to provide energy for tissues, such as skeletal muscle. In the fasting state, the body spares protein breakdown as much as possible to conserve muscle and structural...
2.8K

You might also read

Related Articles

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

Sort by
Same author

Stress response of 18-, 24- and 30-month-old sport horse stallions to a pretraining programme.

Animal : an international journal of animal bioscience·2024
Same author

Enhancement of awareness through feedback does not lead to interlimb transfer of obstacle crossing in virtual reality.

Journal of biomechanics·2023
Same author

Obstacle avoidance training in virtual environments leads to limb-specific locomotor adaptations but not to interlimb transfer in healthy young adults.

Journal of biomechanics·2021
Same author

Sexual cues alter working memory performance and brain processing in men with compulsive sexual behavior.

NeuroImage. Clinical·2020
Same author

Combined radiotherapy and concurrent tumor treating fields (TTFields) for glioblastoma: Dosimetric consequences on non-coplanar IMRT as initial results from a phase I trial.

Radiation oncology (London, England)·2020
Same author

A convenient method for large-scale STM mapping of freestanding atomically thin conductive membranes.

The Review of scientific instruments·2017

Related Experiment Video

Updated: Apr 28, 2026

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers
09:24

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers

Published on: January 28, 2020

7.8K

Maximal lactate steady state in kayaking.

Y Li1, M Niessen1, X Chen2

  • 1Institute of Movement and Training Science II, University of Leipzig, Leipzig, Germany.

International Journal of Sports Medicine
|June 3, 2014
PubMed
Summary
This summary is machine-generated.

The actual blood lactate value at maximal lactate steady state (MLSS) in kayaking is 5.4 mM, not 4 mM. Using 5 mM for calculations provides a more accurate workload estimate for kayakers.

More Related Videos

Determining the Contribution of the Energy Systems During Exercise
11:15

Determining the Contribution of the Energy Systems During Exercise

Published on: March 20, 2012

44.3K
Hyperpolarized 13C Metabolic Magnetic Resonance Spectroscopy and Imaging
11:43

Hyperpolarized 13C Metabolic Magnetic Resonance Spectroscopy and Imaging

Published on: December 30, 2016

10.1K

Related Experiment Videos

Last Updated: Apr 28, 2026

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers
09:24

A Rapidly Incremented Tethered-Swimming Maximal Protocol for Cardiorespiratory Assessment of Swimmers

Published on: January 28, 2020

7.8K
Determining the Contribution of the Energy Systems During Exercise
11:15

Determining the Contribution of the Energy Systems During Exercise

Published on: March 20, 2012

44.3K
Hyperpolarized 13C Metabolic Magnetic Resonance Spectroscopy and Imaging
11:43

Hyperpolarized 13C Metabolic Magnetic Resonance Spectroscopy and Imaging

Published on: December 30, 2016

10.1K

Area of Science:

  • Sports Science
  • Exercise Physiology
  • Biochemistry

Background:

  • Maximal lactate steady state (MLSS) is crucial for determining optimal training intensities in endurance sports.
  • A fixed blood lactate threshold of 4 mM is commonly, but perhaps inaccurately, used to estimate MLSS workload in kayaking.

Purpose of the Study:

  • To determine the precise blood lactate concentration at MLSS in junior kayakers.
  • To measure the actual workload achieved at MLSS in kayaking.
  • To evaluate the accuracy of using a fixed 4 mM blood lactate value for calculating MLSS workload in this population.

Main Methods:

  • An incremental workload test and 4-6 sub-maximal constant workload tests (30 min each) were performed by 8 junior kayakers on a kayaking ergometer.
  • Blood lactate levels and workload were meticulously measured during these tests to identify MLSS.

Main Results:

  • The average blood lactate value at MLSS for junior kayakers was found to be 5.4 ± 0.7 mM.
  • The measured MLSS workload (112 ± 22 watts) was significantly higher than the workload calculated using a 4 mM lactate threshold (104 ± 18 watts).
  • Calculated workloads using fixed lactate values of 5.0 mM or 5.4 mM showed no significant difference compared to the measured MLSS workload.

Conclusions:

  • The commonly used 4 mM blood lactate threshold is an underestimate for determining MLSS workload in kayaking.
  • A fixed blood lactate value closer to 5.0-5.4 mM may provide a more accurate estimation of MLSS workload for junior kayakers.
  • These findings suggest recalibrating the fixed lactate threshold used in training intensity calculations for kayaking.