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

You might also read

Related Articles

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

Sort by
Same author

Feedback from group III/IV afferents in skeletal muscle slows heart rate acceleration when transitioning from rest to low-intensity exercise in males.

Experimental physiology·2026
Same author

A Single Institution Retrospective Review of Pancreatic Stereotactic Body Radiotherapy Outcomes.

Journal of medical imaging and radiation oncology·2026
Same author

The evolution of life size Barbie and Ken: Are they any closer to reality?

PloS one·2026
Same author

The effect of additional skin wetting on physiological strain and exercise performance: systematic review and meta-analysis.

Journal of thermal biology·2026
Same author

Advancing nonclinical blood pressure assessment: Current practices and future directions in drug development.

Regulatory toxicology and pharmacology : RTP·2026
Same author

Cardiac resynchronization therapy with or without atrioventricular node ablation in atrial fibrillation: the CAAN-AF trial.

European heart journal·2026

Related Experiment Video

Updated: Apr 17, 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

9.5K

Standardization of the Dmax method for calculating the second lactate threshold.

Samuel Chalmers1, Adrian Esterman, Roger Eston

  • 1Alliance for Research in Exercise, Nutrition, and Activity, University of South Australia, Adelaide, Australia.

International Journal of Sports Physiology and Performance
|February 25, 2015
PubMed
Summary

New standardized methods (LTSDs and LTSDp) reliably determine the speed at the second lactate threshold (LT2) in runners. These speeds correlate with 10- and 15-km time trial performance, aiding training predictions.

More Related Videos

Author Spotlight: Integrating Alveolar-Capillary Reserve Measurements in Exercise Adaptation and Therapeutic Strategies
08:44

Author Spotlight: Integrating Alveolar-Capillary Reserve Measurements in Exercise Adaptation and Therapeutic Strategies

Published on: February 2, 2024

1.5K
Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
07:26

Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans

Published on: October 17, 2018

21.7K

Related Experiment Videos

Last Updated: Apr 17, 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

9.5K
Author Spotlight: Integrating Alveolar-Capillary Reserve Measurements in Exercise Adaptation and Therapeutic Strategies
08:44

Author Spotlight: Integrating Alveolar-Capillary Reserve Measurements in Exercise Adaptation and Therapeutic Strategies

Published on: February 2, 2024

1.5K
Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans
07:26

Conducting Maximal and Submaximal Endurance Exercise Testing to Measure Physiological and Biological Responses to Acute Exercise in Humans

Published on: October 17, 2018

21.7K

Area of Science:

  • Exercise Physiology
  • Sports Science
  • Performance Analysis

Background:

  • The second lactate threshold (LT2) is a key physiological marker for endurance performance.
  • Accurate determination of LT2 speed is crucial for effective training program design.
  • Existing methods for LT2 calculation, such as Dmax (LTD) and modified Dmax (LTMOD), have limitations.

Purpose of the Study:

  • To evaluate the reliability and validity of two novel standardized methods for calculating speed at the second lactate threshold (LT2).
  • To compare the proposed methods, single standardized lactate threshold (LTSDs) and paired standardized lactate threshold (LTSDp), against established procedures.
  • To assess the practical applicability of these methods for predicting endurance performance.

Main Methods:

  • 13 trained male runners and triathletes underwent two incremental laboratory running tests to establish LT2.
  • Separate outdoor time trials (5, 10, 15 km) were conducted to assess performance.
  • The LTSDs and LTSDp methods were developed and applied for LT2 speed calculation.

Main Results:

  • The LTSDs and LTSDp methods demonstrated high reliability (ICC ≥ .98) and low absolute error (CV ≤ 1.9%) for determining LT2 speed.
  • Calculated LT2 speeds using LTSDs and LTSDp strongly correlated with and were not significantly different from 10- and 15-km time trial speeds (ρc > 0.8).
  • A predictive equation was derived: y = -7.256(ln x) + 157.64, estimating sustainable %LT2 speed for 15-75 min events.

Conclusions:

  • The standardized LTSDs and LTSDp methods provide reliable and valid measures of LT2 speed in trained runners.
  • These methods yield LT2 speeds comparable to actual performance in middle-distance running events.
  • The developed prediction equation offers a valuable tool for estimating sustainable intensity for specific race durations.