Relationship between vagal withdrawal and reactivation indices and aerobic capacity in taekwondo athletes
Perandini, Luiz Augusto, Siqueira-Paraira, Thiago Alfredo, Okuno, Nilo Massaru, Soares-Caldeira, Lúcio Flávio, Leicht, Anthony S., and Nakamura, Fábio Yuzo (2010) Relationship between vagal withdrawal and reactivation indices and aerobic capacity in taekwondo athletes. Revista Brasileira de Cineantropometria & Desempenho Humano, 12 (1). pp. 8-13.
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The aim of this study was to evaluate the relationship between vagal withdrawal and reactivation indices and maximal running velocity (Vmax) in taekwondo athletes. Eleven elite taekwondo athletes (seven men: 23.7±2.2 years, 72.4±7.0 kg, 178.8±7.5 cm, 51.9±2.9 ml.kg-1.min-1, and four women: 18.8±1.5 years, 61.8±1.8 kg, 168.0±4.4 cm, 41.6±2.4 ml.kg-1.min-1) performed a graded exercise test until exhaustion, with the last complete stage performed corresponding to Vmax. Heart rate variability (HRV) parameters were calculated at 1-minute intervals until 85% of maximum HR and plotted against time for the estimation of vagal withdrawal indices (τ, amplitude (A) and area under the curve (AUC)). Vagal reactivation indices were determined based on HR recovery during the first 60 s (HRR60s) and negative reciprocal of the slope of the regression line obtained during the first 30 s of HRR (T30). The vagal withdrawal parameters A and AUC were moderately and significantly correlated with Vmax (r = 0.61-0.71, P < 0.05), whereas τ presented a low correlation (r = 0.22-0.40, P > 0.05). T30 and HRR60s were also significantly correlated with Vmax (r = -0.77 and 0.64, P < 0.05, respectively). The present results showed that vagal withdrawal (A and AUC) and vagal reactivation (T30 and HRR60s) indices were significantly correlated with Vmax, suggesting that these indices can be used for the evaluation and monitoring of aerobic fitness in taekwondo athletes.
|Item Type:||Article (Refereed Research - C1)|
|Keywords:||exercise, heart rate, combat sports|
|FoR Codes:||11 MEDICAL AND HEALTH SCIENCES > 1106 Human Movement and Sports Science > 110602 Exercise Physiology @ 100%|
|SEO Codes:||97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 100%|
|Deposited On:||26 Nov 2010 14:05|
|Last Modified:||12 Feb 2011 20:59|
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