The reliability of back-extrapolation in estimating V˙O2peak in different swimming performances at the severe-intensity domain.

ABSTRACT: The amount of anerobic energy released during exercise might modify the initial phase of oxygen recovery (fast-O_2debt) post-exercise. Therefore, the present study aimed to analyze the reliability of peak oxygen uptake (V˙O2peak) estimate by back-extrapolation (BE-V˙O2peak) under different swimming conditions in the severe-intensity domain, verifying how the alterations of the V˙O2 recovery profile and anerobic energy demand might affect BE-V˙O2peak values. Twenty swimmers (16.7 ± 2.4 years, 173.5 ± 10.2 cm, and 66.4 ± 10.6 kg) performed an incremental intermittent step protocol (IIST: 6 × 250 plus 1 × 200 m, IIST_v200m) for the assessment of V˙O2peak . The V˙O2 off-kinetics used a bi-exponential model to discriminate primary amplitude, time delay, and time constant (A_1off</

SUBMITTER: Massini DA 

PROVIDER: S-EPMC9669915 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature