The need for energy equilibrium.

Area of Science:

• Exercise Physiology
• Human Bioenergetics
• Sports Science

Background:

• Field proxies, like cardiorespiratory fitness tests, are widely used to assess human bioenergetics.
• Concerns exist regarding the validity of these field tests for accurately measuring energy expenditure and utilization.
• Existing methods may suffer from methodological limitations and inappropriate design.

Purpose of the Study:

• To critically evaluate the methodological limitations of current field testing modalities used as predictive models for bioenergetics.
• To discuss the theoretical basis of existing and novel approaches to improve the validity of bioenergetic proxy assessments.
• To propose a framework for designing more accurate field proxies for human bioenergetics.

Main Methods:

• Systematic review of existing literature on human bioenergetics field testing.
• Analysis of the theoretical underpinnings of current proxy assessment methods.
• Discussion of recent studies emphasizing 'energy equilibrium' between reference standards and proxies.

Main Results:

• Current field tests for bioenergetics may have significant methodological limitations.
• The indirect nature of predicting laboratory bioenergetics from field measurements can introduce substantial error.
• A key weakness lies in the design of proxies that do not closely simulate reference laboratory protocols.

Conclusions:

• The validity of current field tests for assessing human bioenergetics is questionable due to design flaws.
• Future research should focus on developing proxies that more accurately simulate laboratory protocols to achieve 'energy equilibrium'.
• Improving proxy design is essential for enhancing the accuracy of bioenergetic predictions and understanding field performance.