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The Journal of Sports Medicine and Physical Fitness 2021 Mar 26

DOI: 10.23736/S0022-4707.21.12314-X

Copyright © 2021 EDIZIONI MINERVA MEDICA

lingua: Inglese

Effect of training at intensities around critical velocity on 400 meters front crawl performance in young swimmers

Jed M. TIJANI 1 , Fatma RHIBI 2, Hassane ZOUHAL 3, Athanasios A. DALAMITROS 4, Abderaouf BEN ABDERRAHMAN 1

1 Higher Institute of Sport and Physical Education of Ksar-Said, University of Manouba, Manouba, Tunisia; 2 Hypoxia and Pathophysiology of Cardiovascular and Respiratory (Hp2) Laboratory, INSERM U1042, University Grenoble Alpes, Grenoble, France; 3 Movement, Sport, Health and Sciences Laboratory (M2S). UFR/APS, University Rennes 2, Rennes, France; 4 Laboratory of Evaluation of Human Biological Performance, School of Physical Education and Sport Sciences, Aristotle University of Thessaloniki, Thessaloniki, Greece


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BACKGROUND: Young swimmers are rarely involved in training control, leading to inadequate volume and prescription of training intensities. This study aimed to examine the effect of prescribing and monitoring training intensities around critical velocity (CV) on 400 m frontcrawl performance during an 8-weeks period.
METHODS: Twenty young male swimmers (13.4±1.0 years) were randomly assigned into two groups. The experimental group (EG) used training monitoring based on intensities around CV (95, 100, 105 and 110% of CV), while for the control group (CG) different heart-rate (HR) zones (EN1+, EN2, EN2+ and EN3) were used as an intensity criterion. The training volume was the same for both EG and CG. A maximal 400 m front-crawl test was performed before and after the 8-week period to determine CV intensities and to assess alternations in performance. The rate of perceived exertion (RPE) and HR values were also evaluated.
RESULTS: Significant main effects of time were observed for T400, CV, HR and RPE. A significant group x time interaction was found for T400 (p=0.035, effect size=1.07, moderate). Results revealed significant pre-to-post improvements for both EG (from 328.46±26.25 to 305.88±20.09) and CG (from 329.07±25.24 to 314.75±19.87). A significant group x time interaction was also found for CV (p=0.005, effect size=1.51, large). Results revealed significant pre-to-post improvements for both EG (from 1.126±0.08 to 1.207±0.07) and CG (from 1.124±0.08 to 1.173±0.07).
CONCLUSIONS: Both training methods induced significant improvements in 400 m front-crawl performance with a greater degree for the training prescription and monitoring using CV intensities.


KEY WORDS: Swimming; Endurance; Training monitoring; Training zones; Critical velocity

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