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Step Length and Individual Anaerobic Threshold Assessment in Swimming

2011Journal article Open access
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dc.contributor.authorFernandes, R.
dc.contributor.authorSousa, M.
dc.contributor.authorMachado, L.
dc.contributor.authorVilas-Boas, J.
dc.date.accessioned2021-04-26T14:04:26Z
dc.date.available2021-04-26T14:04:26Z
dc.date.issued2011
dc.description.abstractAnaerobic threshold is widely used for diagnosis of swimming aerobic endurance but the precise incremental protocols step duration for its assessment is controversial. A physiological and biomechanical comparison between intermittent incremental protocols with different step lengths and a maximal lactate steady state (MLSS) test was conducted. 17 swimmers performed 7×200, 300 and 400 m (30 s and 24 h rest between steps and protocols) in front crawl until exhaustion and an MLSS test. The blood lactate concentration values ([La-]) at individual anaerobic threshold were 2.1±0.1, 2.2±0.2 and 1.8±0.1 mmol.l - 1 in the 200, 300 and 400 m protocols (with significant differences between 300 and 400 m tests), and 2.9±1.2 mmol.l - 1 at MLSS (higher than the incremental protocols); all these values are much lower than the traditional 4 mmol.l - 1 value. The velocities at individual anaerobic threshold obtained in incremental protocols were similar (and highly related) to the MLSS, being considerably lower than the velocity at 4 mmol.l - 1. Stroke rate increased and stroke length decreased throughout the different incremental protocols. It was concluded that it is valid to use intermittent incremental protocols of 200 and 300 m lengths to assess the swimming velocity corresponding to individual anaerobic threshold, the progressive protocols tend to underestimate the [La-] at anaerobic threshold assessed by the MLSS test, and swimmers increase velocity through stroke rate increases.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1055/s-0031-1283189pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.24/1740
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.subjectAdaptation, Physiologicalpt_PT
dc.subjectAdultpt_PT
dc.subjectAnaerobic Thresholdpt_PT
dc.subjectAnalysis of Variancept_PT
dc.subjectExercisept_PT
dc.subjectFemalept_PT
dc.subjectGaitpt_PT
dc.subjectHumanspt_PT
dc.subjectLactic Acidpt_PT
dc.subjectMalept_PT
dc.subjectPhysical Endurancept_PT
dc.subjectSwimmingpt_PT
dc.subjectTime Factorspt_PT
dc.subjectVideotape Recordingpt_PT
dc.titleStep Length and Individual Anaerobic Threshold Assessment in Swimmingpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage946pt_PT
oaire.citation.issue12pt_PT
oaire.citation.startPage940pt_PT
oaire.citation.titleInternational Journal of Sports Medicinept_PT
oaire.citation.volume32pt_PT
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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