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 Experiment Videos

Reduced oxygen availability during high intensity intermittent exercise impairs performance

P D Balsom1, G C Gaitanos, B Ekblom

  • 1Karolinska Institute, Department of Physiology and Pharmacology, Stockholm, Sweden.

Acta Physiologica Scandinavica
|November 1, 1994
PubMed
Summary
This summary is machine-generated.

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

Inhaling salbutamol may decrease time to exhaustion in some contexts of heavy endurance performances.

European journal of sport science·2022
Same author

Influence of Hyperoxic-Supplemented High-Intensity Interval Training on Hemotological and Muscle Mitochondrial Adaptations in Trained Cyclists.

Frontiers in physiology·2019
Same author

Muscle mass and inspired oxygen influence oxygen extraction at maximal exercise: Role of mitochondrial oxygen affinity.

Acta physiologica (Oxford, England)·2018
Same author

Hyperoxia for performance and training.

Journal of sports sciences·2017
Same author

Association of perceived physical health and physical fitness in two Swedish national samples from 1990 and 2015.

Scandinavian journal of medicine & science in sports·2017
Same author

The muscle biopsy technique. Historical and methodological considerations.

Scandinavian journal of medicine & science in sports·2016

Reduced oxygen availability (hypoxia) impairs high-intensity exercise performance. Hypoxia led to greater power output reduction, higher blood lactate, and lower oxygen uptake during repeated sprints.

Area of Science:

  • Exercise Physiology
  • Environmental Physiology

Background:

  • High-intensity intermittent exercise relies on both aerobic and anaerobic energy systems.
  • Understanding the impact of reduced oxygen availability on these systems is crucial for athletic performance.

Purpose of the Study:

  • To investigate the effects of hypoxia on repeated high-intensity exercise performance.
  • To quantify changes in power output, blood lactate, and oxygen uptake under reduced oxygen conditions.

Main Methods:

  • Seven male students completed 10 repeated 6-second cycle ergometer sprints with 30-second recovery.
  • Exercise was performed under both normoxic and hypoxic (526 mmHg) conditions.
  • Power output, pedaling speed, blood lactate, and oxygen uptake were measured.

Related Experiment Videos

Main Results:

  • Hypoxia significantly reduced the ability to maintain target pedaling speed and power output.
  • Blood lactate accumulation was higher, and oxygen uptake was lower during exercise under hypoxic conditions.
  • Performance decrements were more pronounced in the final 3 seconds of each sprint under hypoxia.

Conclusions:

  • Reduced oxygen availability impairs the capacity to sustain high power output during repeated high-intensity exercise.
  • Hypoxia exacerbates anaerobic metabolism, indicated by increased blood lactate.
  • Oxygen uptake is diminished under hypoxic conditions during intermittent exercise.