Verification Phase Confirms V̇O 2max in a Hot Environment in Sedentary Untrained Males.
In: Medicine & Science in Sports & Exercise, Jg. 55 (2023-06-01), Heft 6, S. 1069-1075
Online
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Zugriff:
The verification phase is becoming the norm for confirming V̇O2max during a graded exercise test (GXT), but the use of such testing in untrained participants in the heat remains unknown. Purpose: This study aimed to assess the V̇O2 uptake obtained during a GXT and subsequent verification phase in untrained participants in a hot environment. Methods: Twelve sedentary males completed a GXT followed by a biphasic supramaximal-load verification phase in a hot environment (39°C, 32% relative humidity). Rest between tests occurred in a temperate chamber and lasted until gastrointestinal temperature returned to baseline. Results: Mean verification phase V̇O2max (37.8 ± 4.3 mL·kg−1·min−1) was lower than GXT (39.8 ± 4.1 mL·kg−1·min−1; P = 0.03) and not statistically equivalent. Using an individualized analysis approach, only 17% (2/12) of participants achieved a V̇O2 plateau during the GXT. Verification phase confirmed GXT V̇O2max in 100% of participants, whereas the traditional and the new age-dependent secondary V̇O2max criteria indicated GXT V̇O2max achievement at much lower rates (8/12 [67%] vs 7/12 [58%], respectively). Correlational indices between GXT and verification phase V̇O2max were strong (intraclass correlation coefficient = 0.95, r = 0.86), and Bland–Altman analysis revealed a low mean bias of −2.1 ± 1.9 mL·kg−1·min−1 and 95% limits of agreement (−5.8 to 1.7 mL·kg−1·min−1). Conclusions: Very few untrained males achieved a V̇O2 plateau during GXT in the heat. When conducting GXT in a hot condition, the verification phase remains a valuable addition to confirm V̇O2max in untrained males. [ABSTRACT FROM AUTHOR]
Titel: |
Verification Phase Confirms V̇O 2max in a Hot Environment in Sedentary Untrained Males.
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Autor/in / Beteiligte Person: | PRYOR, J. LUKE ; LAO, PETER ; LEIJA, ROBERT G. ; PEREZ, SERGIO ; MORALES, JACOBO ; LOONEY, DAVID P. ; COCHRANE-SNYMAN, KRISTEN C. |
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Zeitschrift: | Medicine & Science in Sports & Exercise, Jg. 55 (2023-06-01), Heft 6, S. 1069-1075 |
Veröffentlichung: | 2023 |
Medientyp: | academicJournal |
ISSN: | 0195-9131 (print) |
DOI: | 10.1249/MSS.0000000000003126 |
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