Application of V̇o 2 to the Critical Power Model to Derive the Critical V̇o 2
Autor: | Taylor K. Dinyer, Haley C. Bergstrom, Caleb C. Voskuil, Pasquale J. Succi, M. Travis Byrd |
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Rok vydání: | 2021 |
Předmět: |
Physics
Total work Exercise Tolerance Analytical chemistry Physical Therapy Sports Therapy and Rehabilitation General Medicine Respiratory compensation Slow component Metabolic cost Oxygen Oxygen Consumption Critical power Exercise Test Constant power Humans Orthopedics and Sports Medicine Graded exercise test Exercise Time to exhaustion |
Zdroj: | Journal of Strength and Conditioning Research. 36:3374-3380 |
ISSN: | 1064-8011 |
Popis: | Succi, PJ, Dinyer, TK, Byrd, MT, Voskuil, CC, and Bergstrom, HC. Application of V[Combining Dot Above]O2 to the critical power model to derive the critical V[Combining Dot Above]O2. J Strength Cond Res XX(X): 000-000, 2021-The purposes of this study were to (a) determine whether the critical power (CP) model could be applied to V[Combining Dot Above]O2 to estimate the critical V[Combining Dot Above]O2 (CV[Combining Dot Above]O2) and (b) to compare the CV[Combining Dot Above]O2 with the V[Combining Dot Above]O2 at CP (V[Combining Dot Above]O2CP), the ventilatory threshold (VT), respiratory compensation point (RCP), and the CV[Combining Dot Above]O2 without the V[Combining Dot Above]O2 slow component (CV[Combining Dot Above]O2slow). Nine subjects performed a graded exercise test to exhaustion to determine V[Combining Dot Above]O2peak, VT, and RCP. The subjects performed 4 randomized, constant power output work bouts to exhaustion. The time to exhaustion (TLim), the total work (WLim), and the total volume of oxygen consumed with (TV[Combining Dot Above]O2) and without the slow component (TV[Combining Dot Above]O2slow) were recorded during each trial. The linear regressions of the TV[Combining Dot Above]O2 vs. TLim, TV[Combining Dot Above]O2slow vs. TLim, and WLim vs. TLim relationship were performed to derive the CV[Combining Dot Above]O2, CV[Combining Dot Above]O2slow, and CP, respectively. A 1-way repeated-measures analysis of variance (p ≤ 0.05) with follow-up Sidak-Bonferroni corrected pairwise comparisons indicated that CV[Combining Dot Above]O2 (42.49 ± 3.22 ml·kg-1·min-1) was greater than VT (30.80 ± 4.66 ml·kg-1·min-1; p < 0.001), RCP (36.74 ± 4.49 ml·kg-1·min-1; p = 0.001), V[Combining Dot Above]O2CP (36.76 ± 4.31 ml·kg-1·min-1; p < 0.001), and CV[Combining Dot Above]O2slow (38.26 ± 2.43 ml·kg-1·min-1; p < 0.001). However, CV[Combining Dot Above]O2slow was not different than V[Combining Dot Above]O2CP (p = 0.140) or RCP (p = 0.235). Thus, the CP model can be applied to V[Combining Dot Above]O2 to derive the CV[Combining Dot Above]O2 and theoretically is the highest metabolic steady state that can be maintained for an extended period without fatigue. Furthermore, the ability of the CV[Combining Dot Above]O2 to quantify the metabolic cost of exercise and the inefficiency associated with the V[Combining Dot Above]O2 slow component may provide a valuable tool for researchers and coaches to examine endurance exercise. |
Databáze: | OpenAIRE |
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