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

Plasma glucose metabolism during exercise in humans.

A R Coggan1

  • 1Exercise Physiology Laboratory, School of Health, Physical Education, and Recreation, Ohio State University, Columbus.

Sports Medicine (Auckland, N.Z.)
|February 1, 1991
PubMed
Summary

Plasma glucose is a key fuel during exercise, increasing with intensity and duration. Endurance training can lower glucose use, while liver glucose production adjusts to maintain stable blood sugar levels.

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

Glucose kinetics and substrate oxidation during exercise in the follicular and luteal phases.

Journal of applied physiology (Bethesda, Md. : 1985)·2001
Same author

Use of stable isotopes to study carbohydrate and fat metabolism at the whole-body level.

The Proceedings of the Nutrition Society·2000
Same author

Fat metabolism during high-intensity exercise in endurance-trained and untrained men.

Metabolism: clinical and experimental·2000
Same author

Assessment of methods for improving tracer estimation of non-steady-state rate of appearance.

Journal of applied physiology (Bethesda, Md. : 1985)·1999
Same author

Training-induced alterations in fat and carbohydrate metabolism during exercise in elderly subjects.

The American journal of physiology·1998
Same author

Regulation of fatty acid oxidation in untrained vs. trained men during exercise.

The American journal of physiology·1998

Area of Science:

  • Exercise Physiology
  • Human Metabolism
  • Sports Science

Background:

  • Plasma glucose is a critical energy substrate during physical activity, contributing significantly to oxidative energy production.
  • Glucose utilization by muscles increases with exercise intensity and duration, helping to maintain energy supply as muscle glycogen depletes.

Purpose of the Study:

  • To investigate the factors influencing plasma glucose utilization during exercise.
  • To understand the regulation of glucose production and utilization in response to varying exercise conditions and training status.

Main Methods:

  • Analysis of plasma glucose utilization rates under different exercise intensities, durations, and muscle mass involvement.
  • Comparison of glucose metabolism in trained versus untrained individuals.
  • Examination of the roles of hepatic glycogenolysis and gluconeogenesis in maintaining glucose homeostasis.

Main Results:

  • Plasma glucose utilization rises with exercise intensity and duration, and is higher with smaller muscle groups at the same absolute intensity.
  • High fatty acid or glycogen levels reduce glucose utilization, while low carbohydrate diets also decrease it.
  • Endurance training generally lowers plasma glucose utilization at the same absolute exercise intensity.

Conclusions:

  • Plasma glucose concentration is typically maintained during exercise through coordinated adjustments in hepatic glucose production (glycogenolysis and gluconeogenesis).
  • Factors like exercise intensity, duration, diet, and training status significantly modulate glucose utilization and production.
  • Endurance training impacts both glucose utilization and the hormonal regulation of glucose production.

Related Experiment Videos