The dynamics of muscle fibers at the beginning of muscle action ; with a effect of stretching training.

• Project/Area Number: 21700629
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Sports science
• Research Institution: Meisei University
• Principal Investigator: MURAOKA Yoshiho 明星大学, 教育学部, 准教授 (70307990)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2009: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: RFエコーデータ / ストレッチング / 腓腹筋内側頭 / 受動張力 / 足関節可動域 / 超音波法 / Electromechanical Delay

Research Abstract

The purpose of this study was to determine the muscle fascicle behavior using high framerate ultrasound in the onset of voluntary muscle contraction. For this purpose, we usedlocal phase differences between successive raw radio frequency(r-f) signals of ultrasound. Authors could visualize the onset of fascicle movement in wider range of muscle comparedto previous studies. This high-precision analysis of spatio-temporal muscle dynamics wouldgive some new insight into muscle mechanics.

Research Products

• [Presentation] 受動的ストレッチング中の下腿筋群における筋血液量変化 (2011)
  • Author(s): 村岡慈歩, 安田翼, 金子敬二
  • Organizer: 日本体育学会第62回大会
  • Place of Presentation: 鹿児島
  • Year and Date: 2011-09-27
• [Presentation] 受動的ストレッチング中の下腿筋群における筋血液量変化 (2011)
  • Author(s): 村岡慈歩, 安田翼, 金子敬二
  • Organizer: 日本体育学会第62回大会
  • Place of Presentation: 鹿児島県鹿屋市
  • Year and Date: 2011-09-27
• [Presentation] Effect of differences in passive muscle length changes on muscle blood volume (2011)
  • Author(s): YoshihoMuraoka, Tubasa Yasuda, Keiji Kaneko
  • Organizer: XXIIIrd Congress of International Society of Bime chanics
  • Place of Presentation: Belgium, Brssels
  • Year and Date: 2011-07-05
• [Presentation] The effect of differences in passive muscle length changes on muscle blood volume (2011)
  • Author(s): Muraoka, Y., Yasuda, T. and Kaneko, K
  • Organizer: XXIII^<rd> Congress of International Society of Biomechanics
  • Place of Presentation: Brussels
• [Presentation] Muscle fascicle behavior in the onset of muscle force production (2010)
  • Author(s): Muraoka, Y. and Yagi, S
  • Organizer: 15^<th> Annual Congress of the European College of Sport Science
  • Place of Presentation: Turkey