Exploring of optimum paces of uchikomi (repetition training) for foot techniques aimed at enhancing the endurance capacity of collegiate male judo athletes

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  • MASUCHI Katsuyuki
    Laboratory of Judo Coaching, Faculty of Health and Sport Sciences, University of Tsukuba
  • NORIKANE Shin
    Master’s Program in Physical Education, Health and Sport Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba NITTA High School
  • OGURA Daiki
    Master’s Program in Physical Education, Health and Sport Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba Kurume University Fusetsu Junior/Senior High School
  • KUBOTA Yuki
    Master’s Program in Physical Education, Health and Sport Sciences, Graduate School of Comprehensive Human Sciences, University of Tsukuba Department of Health and Sport Sciences, School of Health Sciences, Asahi University
  • MATSUI Takashi
    Laboratory of Exercise Biochemistry, Faculty of Health and Sport Sciences, University of Tsukuba Basic Science Team, Science and Research Department, All Japan Judo Federation

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Other Title
  • 大学男子柔道選手の体力向上に向けた足技かかり練習の至適ペース探索：
  • 大学男子柔道選手の体力向上に向けた足技かかり練習の至適ペース探索 : 代謝・内分泌指標による基礎的検討
  • ダイガク ダンシ ジュウドウ センシュ ノ タイリョク コウジョウ ニ ムケタ アシワザ カカリ レンシュウ ノ シテキ ペース タンサク : タイシャ ・ ナイブンピ シヒョウ ニ ヨル キソテキ ケントウ
  • 代謝・内分泌指標による基礎的検討

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Abstract

The 2017 revised rules for competitive judo require a higher level of stamina. Endurance capacity as a foundation of stamina is enhanced by training/conditioning involving optimum relative exercise intensities associated with the stress response, which has an important impact on biological adaptation mediated by the metabolic/endocrine system. Repetition training in judo techniques (uchikomi) for the shoulder throw (seoi-nage) as a typical hand technique (te-waza) induces blood lactate elevation and the stress response at a faster pace than 1 trial/1.5 s (20 trials/30 s), which is the optimum pace for enhancing endurance capacity in seoi-nage uchikomi. However, the optimum paces of uchikomi for foot techniques (ashi-waza such as uchi-mata, osoto-gari, and ouchi-gari), which are much more popular than hand techniques, remain untested. To address this issue, the present study investigated psychological, physiological, and biochemical parameters in collegiate male judo athletes during pace-incremental repetition training for foot techniques. For all techniques, the Borg scale, heart rate, and estimated oxygen consumption increased in a repetition pace-dependent manner. Blood lactate levels were unchanged at a slow repetition pace but began to increase at a pace of 1 trial/1.25 s (24 trials/30 s) for osoto-gari, 1 trial/1.0 s (30 trials/30 s) for uchi-mata, and 1 trial/0.85 s (35 trials/30 s) for ouchi-gari. At the maximal repetition pace, the level of blood lactate neared or exceeded 10 mM, and the level of plasma adrenocorticotropic hormone (ACTH), a stress marker, increased for all techniques. Our findings provide metabolic/endocrine evidence for the optimum paces of repetition training for foot techniques aimed at improvement of endurance capacity, which are ≧ 1 trial/1.25 s for osotogari, ≧ 1 trial/1.0 s for uchi-mata, and ≧ 1 trial/0.85 s for ouchi-gari. This experimental protocol and perspective on relative intensity related to metabolic/endocrine parameters in judo movements should ultimately contribute to better training/conditioning programs for judo-specific stamina.

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