A new nonexercise-based VO2(max) equation for aerobically trained females

Area of Science:

• Exercise Physiology
• Sports Science
• Cardiorespiratory Fitness

Background:

• Accurate estimation of maximal oxygen uptake (VO2max) is crucial for assessing aerobic fitness in trained individuals.
• Existing VO2max prediction equations may lack accuracy for specific populations, such as aerobically trained females.
• Modifying and validating existing equations or deriving new ones is necessary to improve estimation accuracy.

Purpose of the Study:

• To modify and cross-validate existing VO2max equations for aerobically trained females.
• To derive and validate a new nonexercise-based VO2max equation if modifications prove inadequate.
• To enhance the precision of VO2max estimation in this demographic.

Main Methods:

• 115 aerobically trained females underwent maximal incremental cycle ergometer testing to determine actual VO2max.
• Nine published VO2max equations were evaluated against actual values using constant error (CE), standard error of estimate (SEE), and total error (TE).
• A new nonexercise-based equation was derived and cross-validated using the PRESS statistic.

Main Results:

• Modified nonexercise equations showed a total error (TE) greater than or equal to 13% upon cross-validation.
• A new nonexercise equation was derived: VO2max = 18.528(weight) + 11.993(height) - 17.197(age) + 23.522(training hrs/wk) + 62.118(training intensity) + 278.262(ln years training) - 1375.878.
• The new equation achieved a TE of 10% when cross-validated on an independent sample.

Conclusions:

• The newly derived nonexercise-based equation demonstrates superior accuracy for estimating VO2max in aerobically trained females.
• This equation is recommended for practical application over previously published models.
• Improved VO2max estimation can aid in training prescription and performance monitoring.