A comparison of some indirect methods for predicting maximal oxygen uptake

Area of Science:

• Exercise Physiology
• Sports Science
• Cardiorespiratory Fitness Assessment

Background:

• Accurate prediction of maximum aerobic power (VO2 max) is crucial for exercise prescription and performance evaluation.
• Several indirect methods exist to estimate VO2 max, but their efficacy varies.
• Identifying the most reliable and practical indirect test is essential for widespread application.

Purpose of the Study:

• To comparatively evaluate four indirect tests for predicting VO2 max in male subjects.
• To assess the accuracy of submaximal heart rate tests (cycling, stepping, walking), a timed 2km run, and body fat content in predicting VO2 max.
• To determine the most suitable indirect method for estimating VO2 max based on accuracy, cost, safety, and time.

Main Methods:

• Nine male participants underwent direct VO2 max measurement via treadmill.
• Indirect VO2 max was predicted using four methods: submaximal heart rate during cycling, stepping, and walking, and time to complete a 2km run.
• VO2 max was also predicted from body fat percentage.

Main Results:

• The timed 2km run and the step test provided the most accurate predictions of VO2 max.
• Predicting VO2 max from heart rate during walking and body fat content yielded inadequate and unreliable results.
• The timed run demonstrated superior predictive capability compared to other indirect methods.

Conclusions:

• The timed 2km run is the most practical and suitable submaximal test for indirect VO2 max determination.
• The step test also offers a reliable alternative for estimating VO2 max.
• Indirect methods relying on walking heart rate or body fat are not recommended for accurate VO2 max prediction.