| Autor: |
LISBÔA, FELIPE D., RAIMUNDO, JOÃO A. G., PEREIRA, GUSTAVO S., RIBEIRO, GUILHERME, DE AGUIAR, RAFAEL A., CAPUTO, FABRIZIO |
| Předmět: |
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| Zdroj: |
Journal of Strength & Conditioning Research; Mar2021, Vol. 35 Issue 3, p819-825, 7p |
| Abstrakt: |
This study aimed to investigate the performance, race splits, metabolic, and stroke parameters during 2 successive 50-m front crawl under conditions simulating a competition. Eleven competitive male swimmers (20 ± 3 years, 182 ± 5 cm, and 77 ± 5 kg) performed 2 successive 50-m front crawl trials in a 50-m swimming pool at 10 AM and 5 PM. Block time (tB), 15-m performance (t.15-m), and 50-m performance (t.50-m) were measured. Velocity (V), stroke rate (SR), stroke length (SL), and stroke index (SI) were measured at 3 time points during the trials. Pre-trial and posttrial blood samples were taken to determine blood lactate accumulation (D[Lac]). For t.50-m, the relative difference between 10 AM and 5 PM reached 0.1% (p = 0.7; effect size [ES] = 0.02). Furthermore, no differences in tB (p = 0.12; ES = 20.28) and t.15-m (p = 0.39; ES = 20.16) were observed between periods. Both V (p = 0.11; ES =- 20.14) and SI (p = 0.16; ES = -0.15) were also similar. Higher values of SR were recorded at 10 AM (p = 0.03; ES = 20.32), whereas the morning values of SL were lower (p = 0.04; ES =- 0.3). D[Lac] was not significantly different between periods (p = 0.07; ES = -20.27). Although time of the day did not impact performance in 2 successive 50-m front crawl performances, different stroke parameters profiles were observed during these trials. This may help coaches design specific warm-up exercises to enhance performance at different times of the day. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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