Does the difference in breathing technique contribute to reducing the passive drag of the swimmer?

• Project/Area Number: 26750289
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Sports science
• Research Institution: Sendai University (2016); Biwako Seikei Sport College (2014-2015)
• Principal Investigator: WATANABE YASUNORI 仙台大学, 体育学部, 講師(移行) (50638418)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2016: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000); Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: 浮心重心間距離 / 水中牽引時抵抗 / 腹式呼吸 / ストリームライン / 胸部周径囲 / 腹部周径囲 / 肺残気量 / ２次曲線 / トルク / 水平姿勢 / 水中牽引 / 受動抵抗 / 浮力

Outline of Final Research Achievements

This study aims to investigate the effect of breathing technique on passive drag during underwater towing. We attempted to evaluate the breathing technique in swimmer's streamline posture by simultaneously measuring lung capacity and passive drag under water. Differences in breathing technique were evaluated with a pickup device attached to the chest and abdomen of the subject. Resistance was measured by the device equipped with a force sensor and a tachometer on the electric reel. The abdominal breathing increased ventilation compared to chest breathing, resistance at towing decreased. The results suggested that abdominal respiration may be contribute to reducing resistance during the streamline posture under water.

Research Products

• [Journal Article] The Effects of Breathing on Center of Buoyancy and Buoyancy Torque in Junior Elite Swimmers. (2015)
  • Author(s): Watanabe Y., Wakayoshi K., Nomura T., Tachi M.
  • Journal Title: Proceeding of the 1st Asia-Pacific Conference on Coaching Science Volume: 1 Pages: 127-128
  • Peer Reviewed / Int'l Joint Research
• [Presentation] 浮力・浮心重心間距離が水中牽引時抵抗に及ぼす影響 (2017)
  • Author(s): 渡邉泰典、若吉浩二
  • Organizer: 日本コーチング学会第28回大会兼第10回日本体育学会体育方法専門領域研究会
  • Place of Presentation: 早稲田大学東伏見キャンパス（東京）
• [Presentation] The Effect of Shoulder Position Difference of Streamline Posture in Competitive Swimmers (2016)
  • Author(s): Watanabe Y., Wakayoshi K., Nomura T
  • Organizer: 34th International Conference on Biomechanics in Sports
  • Place of Presentation: University of Tsukuba
  • Year and Date: 2016-07-18
  • Int'l Joint Research
• [Presentation] 大学女子水球選手の移動手段別にみた牽引泳によるパワー評価法の検討 (2016)
  • Author(s): 渡邉泰典、森翼、若吉浩二
  • Organizer: 2016年度日本水泳・水中運動学会
  • Place of Presentation: 国立スポーツ科学センター（東京）