The Reliability and Validity of a Four-Minute Running Time-Trial in Assessing VO(2)max and Performance

作者：McGawley Kerry^*

来源：Frontiers in Physiology, 2017, 8: 270.

DOI：10.3389/fphys.2017.00270

• graded-exercise test
• maximal oxygen uptake
• reproducibility
• testing
• verification phase

Introduction: Traditional graded-exercise tests to volitional exhaustion (GXTs) are limited by the need to establish starting workloads, stage durations, and step increments. Short-duration time-trials (TTs) may be easier to implement and more ecologically valid in terms of real-world athletic events. The purpose of the current study was to assess the reliability and validity of maximal oxygen uptake (VO(2)max) and performance measured during a traditional GXT (STEP) and a four-minute running time-trial (RunTT).
Methods: Ten recreational runners (age: 32 +/- 7 years; body mass: 69 +/- 10 kg) completed five STEP tests with a verification phase (VER) and five self-paced RunTTs on a treadmill. The order of the STEP/VER and RunTT trials was alternated and counter-balanced. Performance was measured as time to exhaustion (TTE) for STEP and VER and distance covered for RunTT.
Results: The coefficient of variation (CV) for. VO2max was similar between STEP, VER, and RunTT (1.9 +/- 1.0, 2.2 +/- 1.1, and 1.8 +/- 0.8%, respectively), but varied for performance between the three types of test (4.5 +/- 1.9, 9.7 +/- 3.5, and 1.8 +/- 0.7% for STEP, VER, and RunTT, respectively). Bland-Altman limits of agreement (bias +/- 95%) showed. VO(2)max to be 1.6 +/- 3.6 mL.kg(-1).min(-1) higher for STEP vs. RunTT. Peak HR was also significantly higher during STEP compared with RunTT (P = 0.019).
Conclusion: A four-minute running time-trial appears to provide more reliable performance data in comparison to an incremental test to exhaustion, but may underestimate. VO(2)max.

• 出版日期2017-5-3