We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
[Formula: see text] kinetics and energy contribution in simulated maximal performance during short and middle distance-trials in swimming.
- Authors
Almeida, Tiago A. F.; Pessôa Filho, Dalton M.; Espada, Mário A. C.; Reis, Joana F.; Simionato, Astor R.; Siqueira, Leandro O. C.; Alves, Francisco B.
- Abstract
<bold>Purpose: </bold>This study aims to analyze swimmers' oxygen uptake kinetics ([Formula: see text]K) and bioenergetic profiles in 50, 100, and 200 m simulated swimming events and determine which physiological variables relate with performance.<bold>Methods: </bold>Twenty-eight well-trained swimmers completed an incremental test for maximal oxygen uptake (Peak-[Formula: see text]) and maximal aerobic velocity (MAV) assessment. Maximal trials (MT) of 50, 100, and 200-m in front crawl swimming were performed for [Formula: see text]K and bioenergetic profile. [Formula: see text]K parameters were calculated through monoexponential modeling and by a new growth rate method. The recovery phase was used along with the blood lactate concentration for bioenergetics profiling.<bold>Results: </bold>Peak-[Formula: see text] (57.47 ± 5.7 ml kg-1 min-1 for male and 53.53 ± 4.21 ml kg-1 min-1 for female) did not differ from [Formula: see text]peak attained at the 200-MT for female and at the 100 and 200-MT for male. From the 50-MT to 100-MT and to the 200-MT the [Formula: see text]K presented slower time constants (8.6 ± 2.3 s, 11.5 ± 2.4 s and 16.7 ± 5.5 s, respectively), the aerobic contribution increased (~ 34%, 54% and 71%, respectively) and the anaerobic decreased (~ 66%, 46% and 29%, respectively), presenting a cross-over in the 100-MT. Both energy systems, MAV, Peak-[Formula: see text], and [Formula: see text] peak of the MT's were correlated with swimming performance.<bold>Discussion: </bold>The aerobic energy contribution is an important factor for performance in 50, 100, and 200-m, regardless of the time taken to adjust the absolute oxidative response, when considering the effect on a mixed-group regarding sex. [Formula: see text]K speeding could be explained by a faster initial pacing strategy used in the shorter distances, that contributed for a more rapid increase of the oxidative contribution to the energy turnover.
- Subjects
AEROBIC capacity; BLOOD lactate; ANALYTICAL mechanics; OXYGEN metabolism; ENERGY metabolism; OXYGEN consumption; RESEARCH funding; SWIMMING; LACTIC acid
- Publication
European Journal of Applied Physiology, 2020, Vol 120, Issue 5, p1097
- ISSN
1439-6319
- Publication type
journal article
- DOI
10.1007/s00421-020-04348-y