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Int J Sports Med 2020; 41(12): 839-845
DOI: 10.1055/a-1179-5806
Training & Testing

Effects of Wearing a Jaw-repositioning Intra-oral Device in Synchronized Swimming Athletes

Monica Solana-Tramunt 
1   Facultat de Psicologia, Ciències de l'Educació i de l'Esport Blanquerna, Fundacio Blanquerna Universitat Ramon Llull, Barcelona, Spain
,
Bernat Buscà 
1   Facultat de Psicologia, Ciències de l'Educació i de l'Esport Blanquerna, Fundacio Blanquerna Universitat Ramon Llull, Barcelona, Spain
,
Jose Morales
1   Facultat de Psicologia, Ciències de l'Educació i de l'Esport Blanquerna, Fundacio Blanquerna Universitat Ramon Llull, Barcelona, Spain
,
Adrià Miró
1   Facultat de Psicologia, Ciències de l'Educació i de l'Esport Blanquerna, Fundacio Blanquerna Universitat Ramon Llull, Barcelona, Spain
,
Joan Aguilera-Castells 
1   Facultat de Psicologia, Ciències de l'Educació i de l'Esport Blanquerna, Fundacio Blanquerna Universitat Ramon Llull, Barcelona, Spain
,
Jordi Arboix-Alió
1   Facultat de Psicologia, Ciències de l'Educació i de l'Esport Blanquerna, Fundacio Blanquerna Universitat Ramon Llull, Barcelona, Spain
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Abstract

The effects of wearing an intra-oral device on several ventilatory and fatigue markers have been reported for a variety of sports. The quality of the figures performed in synchronized swimming is directly affected by fatigue, and can be monitored during training sessions (TS). The aim of the study was to investigate the acute effects of wearing customized intra-oral devices on heart rate variability, rating of perceived exertion, blood lactate accumulation, and salivary cortisol production during a competitive training session. Twelve highly trained elite female athletes (age: 21.0±3.6 years) participated in the study. Fatigue markers were assessed at the beginning and at the end of the 3rd and 5th afternoon TS for that week, once with and once without an intra-oral device, in random order. Salivary cortisol levels were higher in relation to the baseline in the intra-oral device condition (P<0.05) but not in athletes without an intra-oral device. No differences between conditions were found in rating of perceived exertion (P=0.465) and blood lactate (P=0.711). No time or condition interactions or main effects were shown for heart rate variability. Thus, there is no evidence that wearing a low-arch intra-oral device is a good recommendation for high-standard athletes performing long and stressful routines.

Key words

mouthguard - ergogenic effects - fatigue - training load - performance


Publication History

Received: 02 January 2020

Accepted: 06 May 2020

Article published online:
26 June 2020

© 2020. Thieme. All rights reserved.

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany

 

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