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Physiological regulation of marathon performance.

Edward F Coyle¹

¹Department of Kinesiology and Health Education, University of Texas at Austin, Austin, Texas 78712, USA. coyle@mail.utexas.edu

Sports Medicine (Auckland, N.Z.)

|May 1, 2007

Summary

Elite marathon performance is limited by aerobic metabolism and carbohydrate availability. Physiological limits suggest a marathon time of approximately 1:58:00 is achievable with optimal running economy and fatigue management.

Area of Science:

Exercise Physiology
Sports Science
Human Performance

Background:

Marathon running performance is influenced by physiological factors.
Aerobic metabolism, energy availability, and thermoregulation are key determinants.
Previous models suggest a theoretical marathon time limit.

Purpose of the Study:

To explore the physiological factors limiting marathon performance.
To evaluate the theoretical potential for achieving faster marathon times.
To identify key physiological variables for optimizing marathon running speed.

Main Methods:

Analysis of physiological determinants of endurance running.
Modeling of marathon performance based on aerobic capacity and energy utilization.

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Consideration of factors like running economy and muscle recruitment patterns.

Main Results:

Marathon speed is regulated by aerobic metabolism (oxygen uptake) and limited carbohydrate energy (muscle glycogen, blood glucose).
Hyperthermia is a critical factor limiting achievable velocity.
A 1991 model by Joyner suggests a theoretical marathon potential of approximately 1:58:00.

Conclusions:

The ultimate limit to marathon performance may be determined by running economy.
Efficient recruitment of musculature to minimize fatigue is crucial.
Optimizing these factors could enable achieving the theoretical marathon potential.