Predicting Maximal Oxygen Uptake Using the 3-Minute All-Out Test in High-Intensity Functional Training Athletes

• Main Authors: Joshua D. Dexheimer (Author), Shane J. Brinson (Author), Robert W. Pettitt (Author), E. Todd Schroeder (Author), Brandon J. Sawyer (Author), Edward Jo (Author)
• Format: Book
• Published: MDPI AG, 2020-11-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

Summary

Maximal oxygen uptake (VO_2max) and critical speed (CS) are key fatigue-related measurements that demonstrate a relationship to one another and are indicative of athletic endurance performance. This is especially true for those that participate in competitive fitness events. However, the accessibility to a metabolic analyzer to accurately measure VO_2max is expensive and time intensive, whereas CS may be measured in the field using a 3 min all-out test (3MT). Therefore, the purpose of this study was to examine the relationship between VO_2max and CS in high-intensity functional training (HIFT) athletes. Twenty-five male and female (age: 27.6 ± 4.5 years; height: 174.5 ± 18.3 cm; weight: 77.4 ± 14.8 kg; body fat: 15.7 ± 6.5%) HIFT athletes performed a 3MT as well as a graded exercise test with 48 h between measurements. True VO_2max was determined using a square-wave supramaximal verification phase and CS was measured as the average speed of the last 30 s of the 3MT. A statistically significant and positive correlation was observed between relative VO_2max and CS values (r = 0.819, <i>p</i> < 0.001). Based on the significant correlation, a linear regression analysis was completed, including sex, in order to develop a VO_2max prediction equation (VO_2max (mL/kg/min) = 8.449(CS) + 4.387(F = 0, M = 1) + 14.683; standard error of the estimate = 3.34 mL/kg/min). Observed (47.71 ± 6.54 mL/kg/min) and predicted (47.71 ± 5.7 mL/kg/min) VO_2max values were compared using a dependent t-test and no significant difference was displayed between the observed and predicted values (<i>p</i> = 1.000). The typical error, coefficient of variation, and intraclass correlation coefficient were 2.26 mL/kg/min, 4.90%, and 0.864, respectively. The positive and significant relationship between VO_2max and CS suggests that the 3MT may be a practical alternative to predicting maximal oxygen uptake when time and access to a metabolic analyzer is limited.

Item Description

10.3390/sports8120155
2075-4663