Physiological Responses of Continuous and Intermittent Swimming at Critical Speed and Maximum Lactate Steady State in Children and Adolescent Swimmers

Overview

Journal Sports (Basel)

Publisher MDPI

Specialty Public Health

Date 2019 Jan 24

PMID 30669295

Citations 4

Authors

Ioannis S Nikitakis

Giorgos P Paradisis

Gregory C Bogdanis

Argyris G Toubekis

Affiliations

Soon will be listed here.

Abstract

Background: The purpose of this study was to compare physiological responses during continuous and intermittent swimming at intensity corresponding to critical speed (CS: slope of the distance vs. time relationship using 200 and 400-m tests) with maximal lactate steady state (MLSS) in children and adolescents.

Methods: CS and the speed corresponding to MLSS (sMLSS) were calculated in ten male children (11.5 ± 0.4 years) and ten adolescents (15.8 ± 0.7 years). Blood lactate concentration (BL), oxygen uptake ( V · O₂), and heart rate (HR) at sMLSS were compared to intermittent (10 × 200-m) and continuous swimming corresponding to CS.

Results: CS was similar to sMLSS in children (1.092 ± 0.071 vs. 1.083 ± 0.065 m·s; = 0.12) and adolescents (1.315 ± 0.068 vs. 1.297 ± 0.056 m·s; = 0.12). However, not all swimmers were able to complete 30 min at CS and BL was higher at the end of continuous swimming at CS compared to sMLSS (children: CS: 4.0 ± 1.8, sMLSS: 3.4 ± 1.5; adolescents: CS: 4.5 ± 2.3, sMLSS: 3.1 ± 0.8 mmol·L; < 0.05). V · O₂ and HR in continuous swimming at CS were not different compared to sMLSS ( > 0.05). BL, V · O₂ and HR in 10 × 200-m were similar to sMLSS and no different between groups.

Conclusion: Intermittent swimming at CS presents physiological responses similar to sMLSS. Metabolic responses of continuous swimming at CS may not correspond to MLSS in some children and adolescent swimmers.

Citing Articles

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Verifying Physiological and Biomechanical Parameters during Continuous Swimming at Speed Corresponding to Lactate Threshold.

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