2014, Volume 10, Issue 1

Exercise domain profile through pulmonary gas exchange response during Kendo practice by men



Andrei Sancassani1, Dalton Muller Pessoa Filho1

1College of Sciences, State University of São Paulo/Bauru Campus, Brazil


Author for correspondence: Dalton Muller Pessoa Filho; College of Sciences, State University of São Paulo/Bauru Campus, Brazil; email: dmpf[at]fc.unesp.br


Full text

Abstract

Background and Study Aim: The metabolic rate demanded during the practice of Kendo techniques has not been reported, despite of it importance to physical training program. This study aimed to characterize exercise intensity during Kendo practice based on pulmonary gas exchange profiles.
Material and Methods: Nine skilled male athletes (29.7±7.7 years, 174.9±9.1cm, 82.1±14.9kg body weight) underwent the following protocols: (1) body composition via DXA, (2) progressive treadmill test to assess VO2max, gas exchange threshold (GET) and respiratory compensation point (RCP), and (3) Kendo techniques (11 for warm-ups and 31 for Waza). The techniques were performed twice, with a 24h break in between. The VO2 value was obtained using K4b2 (COSMED®) technology, and heart rate (HR) was recorded by 420sd (Polar®) frequencimeter.
Results: The VO2 profile reached 84.7±13.5% VO2max and 85.3±17.2% VO2max at the end of Warm-up and Waza protocols, respectively. VCO2 showed the same profile: 83.5±9.40% and 81.1±13.7% VCO2max for Warm-up and Waza. However, HR (97.8±3.3% and 103.4±3.6% HRmax) and VE (90.1±15.6 and 107.8±13.2% VEmax) elicited values that were trunked to maximum rates at the end of Warm-up and Waza. The RER values at the end of Warm-up (1.19±0.15) and Waza (1.16±0.05) were greater than 1.1. All variables did not differ from their respective maximum rate values at the end of Warm-up and Waza (r£0.05, ANOVA with Tukey as post-hoc).
Conclusions: Thus, VO2 and VCO2 profiles classified the Kendo practice as a heavy domain exercise, while HR, VE and RER classified it as a heavy-to-severe domain exercise.


Key words: continuous heart rate recording, exercise classification, martial arts, oxygen during exercise, skill performance