Activités physiques de combat en milieu scolaire

Oxygen uptake and cardiorespiratory responses during selected fighting techniques in judo and kendo

1999, Sports Med. Training and Rehab., Vol 9(2), 129-139, S. Ahmaidi and al.

Abstract :

The goal of this study was to compare oxygen uptake (VO2) and cardiorespiratory responses during two selected fighting techniques in kendo and judo and to express the effort levels required to those measured during maximal incremental exercise test. Eight male, aged 22.8 ± 2.9 years, with a moderate level of ability in fighting sport, volunteered for the study. They randomly performed once a week a maximal exercise test on cycle ergometer and a judo and kendo fighting sessions, respectively, against the same adversary. VO2 and cardiorespitory responses were measured at rest, at each minute during 3 min of fighting and during a maximal incremental exercise test, with a Cosmed K2 telemetric gas exchanges analyser. Aerobic energy expenditure was calculated during the 3 fighting minutes as the difference between VO2 determined at each minute and VO2 at rest. The judo technique required a subject wearing the cosmed K2 to remain upright and throw his adversary down. For the adversary, it consists to raise the subject from ground. The kendo technique consists of fighting with stick according to an adapted federal Kendo rule. At rest, there was no difference between judo and kendo in all cardiorespiratory variables including VO2. The VO2 reached a high percentage of the maximal value at the 3rd minute of fighting but did not differ, respectively, between judo and kendo [1st min : 14.79 ± 5.05 (28%) vs. 17.75 ± 3.8 (34%), 2nd min : 35.39 ± 12.85 (68%) vs. 34.38 ± 5.54 (66%) and 3rd min : 40.73 ± 4.05 (78%) vs. 34.14 ± 6.13 (65%) ml.min-1.kg.-1]. Analysis of ventilatory gas exchange lead to similar results with largest percentage for judo and kendo compared with the VO2 max test respiratory variables at the 3rd minute for pulmonary ventilation [1st min : 33.31 ± 10.89 (32%) vs. 38.55 ± 4.2 (37%), 2nd min : 63.78 ± 16.64 (62%) vs. 59.01 ± 11.15 (57%) and 3rd min : 71.51 ± 15.87 (69%) vs. 61.68 ± 12.55 (60%) min-1], tidal volume [1st min : 1.31 ± 0.40 vs. 1.33 ± 0.48, 2nd min : 1.94 ± 0.49 vs. 1.86 ± 0.41 and 3rd min : 2.08 ± 0.5 vs. 1.97 ± 0.39 l], and breathing frequency [1st min : 26.91 ± 8.23 vs. 2.62 ± 7.02, 2nd min : 33.99 ± 6.64 vs. 32.96 ± 5.97 and 3rd min : 35.60 ± 6.64 vs 32.72 ± 5.73 cycle.min-1]. Cardiac response also reached high percentages at the 3rd minute but values remain identical for heart rate [1st min : 130 ± 22 (70%) vs. 137 ± 21 (73%), 2nd min : 161 ± 18 (86%) vs. 157 ± 13 (84%) and 3rd min : 166 ± 18 (89%) vs. 162 ± 13 (86%) beat.min-1], and oxygen pulse [1st min : 8 ± 2.1 vs. 9.4 ± 2.4, 2nd min : 15.62 ± 3.88 vs. 15.84 ± 2.60] and 3rd min : 17.85 ± 3.24vs. 15.22 ± 2.68 ml.kg-l.beat-1]. These results indicate that, in practical conditions, the two selected fighting of judo and kendo require a similar and large oxygen uptake and cardiorespiratory response.

Keywords : Bioenergetic ; oxygen uptake ; ventilatory gas exchange ; cardiac responses ; judo and kendo


See the french communication :

5ème JORRESCAM, Toulouse, 1998

Dépense énergétique et reponses cardioventilatoire lors de deux situations de combat en judo et en kendo


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