Maximal aerobic speed: methodological implications and unintended consequences

Area of Science:

• Exercise Physiology
• Sports Science
• Biomechanics

Background:

• Maximal aerobic speed (MAS) is a key physiological metric.
• MAS links maximal oxygen consumption (V̇O_2max) and running economy.
• Current MAS determination methods lack standardization.

Purpose of the Study:

• To critically evaluate existing methods for determining MAS.
• To identify flaws and assumptions in current MAS assessment approaches.
• To propose a more objective and reliable method for MAS determination.

Main Methods:

• Analysis of three dominant MAS determination approaches.
• Exploration of assumptions and limitations of each method.
• Comparison of linear extrapolation versus direct V̇O_2max/running economy division.

Main Results:

• The loss of linearity approach lacks objectivity.
• Linear extrapolation introduces significant errors, especially at speed extremes.
• The direct division method offers greater accuracy and practicality.

Conclusions:

• Existing MAS determination methods are flawed.
• A simplified approach dividing V̇O_2max by race-relevant running economy is recommended.
• This method enhances objectivity and can be integrated into single testing sessions.