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

Hemoglobin/myoglobin oxygen desaturation during Alpine skiing.

L Szmedra1, J Im, S Nioka

  • 1Bloomsburg University of Pennsylvania, Bloomsburg, PA, USA.

Medicine and Science in Sports and Exercise
|February 27, 2001
PubMed
Summary

Giant slalom (GS) skiing involves greater muscle blood volume reduction and oxygen desaturation than slalom (SL) due to lower postures. This indicates compromised blood flow to working muscles during GS events.

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

Changes in nerve conduction and Pi/PCr ratio during denervation-reinnervation of the gastrocsoleus muscles of rats.

Archives of physical medicine and rehabilitation·1992
Same author

Oxygen radical generation during ischemia-reperfusion in the isolated perfused rat liver monitored by enhanced chemiluminescence.

Circulatory shock·1992
Same author

Phorbol myristate acetate-induced lung injury: involvement of reactive oxygen species.

Scandinavian journal of clinical and laboratory investigation·1992
Same author

The effect of ruthenium red during Ca2+ depletion and repletion in the isolated perfused rat liver.

Research communications in chemical pathology and pharmacology·1992
Same author

Multiparametric evaluation of brain functions in the Mongolian gerbil in vivo.

Journal of basic and clinical physiology and pharmacology·1992
Same author

Dual wavelength spectrophotometry as a diagnostic test of the pulp chamber contents.

Oral surgery, oral medicine, and oral pathology·1992

Area of Science:

  • Sports Physiology
  • Exercise Science
  • Biomechanics

Background:

  • Alpine ski racing, including giant slalom (GS) and slalom (SL), demands significant physiological exertion.
  • Understanding muscle oxygenation and blood flow dynamics is crucial for optimizing athletic performance and preventing fatigue.

Purpose of the Study:

  • To investigate changes in muscle blood volume (BV) and oxygen desaturation (OD) during simulated GS and SL Alpine ski racing.
  • To compare these physiological responses between GS and SL events in junior elite skiers.

Main Methods:

  • Thirty junior elite skiers (ages 9-17) participated, stratified by age and ski class.
  • Near-infrared spectrophotometry (NIRS) measured vastus lateralis muscle BV and OD during simulated GS and SL trials.
  • Joint angles, heart rate, and maximal OD during ischemia were also assessed.

Related Experiment Videos

Main Results:

  • Smaller joint angles were observed during GS compared to SL for the ankle, knee, and hip.
  • A significantly greater reduction in muscle blood volume (Delta BV) and oxygen desaturation (Delta OD) occurred during GS versus SL.
  • Older skiers with larger quadriceps cross-sectional area (CSA) showed a correlation with greater Delta OD.

Conclusions:

  • The lower posture adopted during GS, compared to SL, leads to greater muscle blood volume reduction and oxygen desaturation.
  • This physiological response suggests compromised blood flow to working muscles during GS, potentially due to increased static load and muscle contraction.
  • Findings highlight the distinct physiological demands of GS and SL ski racing.