Biomechanical study of relationship between joint powers of the lower limb during the standing long jump and maximum isokinetic strength

DOI Web Site Web Site 1 Citations 16 References
  • Yokozawa Toshiharu
    Department of Sports Science, Japan Institute of Sports Sciences
  • Kumagawa Daisuke
    Department of Sports Science, Japan Institute of Sports Sciences
  • Arakawa Hiroshi
    Department of Physical Education, Faculty of Physical Education, International Budo University
  • Katsumata Yoichi
    Faculty of Applied Biological Sciences, Tokyo University of Agriculture
  • Akagi Ryota
    Department of Bioscience and Engineering, College of Systems Engineering and Science, Shibaura Institute of Technology

Bibliographic Information

Other Title
  • 立幅跳踏切動作中の下肢関節パワーと等速性最大筋力との関係に関するバイオメカニクス的研究
  • タチハバトビ フミキリ ドウサ チュウ ノ カシ カンセツ パワー ト トウソクセイ サイダイキンリョク ト ノ カンケイ ニ カンスル バイオメカニクステキ ケンキュウ
  • Biomechanical study of relationship between joint powers of the lower limb during the standing long jump and maximum isokinetic strength [in Japanese]

Search this article

Abstract

 The purpose of this study was to identify the biomechanical factors limiting distance and the jump technique in the maximum effort standing long jump. The limiting factors and jump technique were identified through an analysis of the relationship between patterns of joint powers in the propulsion phase of the standing long jump and maximum isokinetic strength of the lower limb. The participants were 11 male athletes specializing in different events. Isokinetic strength of the extensor muscles at the ankle (30 and 90 deg/s), knee (60 and 180 deg/s), and hip (60 and 180 deg/s) joints was evaluated by dynamometry. Joint powers in the propulsion phase of standing long jump were calculated by inversed dynamics methods using digitized two-dimensional coordinate data (50 Hz) and ground reaction force data (500 Hz). Pearson's product-moment correlation analyses were used to assess the relationships between jump distance, joint powers over the propulsion phase, and isokinetic strength of the lower limb joints. The results indicated the following.<br>  1. The magnitude of the body center of mass velocity and whole body mechanical energy at toe-off were correlated with jump distance (velocity: r=0.857, p<0.01, energy: r=0.926, p<0.01).<br>  2. Peak powers at the knee and hip joints over the propulsion phase, normalized to body mass, were correlated with jump distance (knee: r=0.767, p<0.01, hip: r=0.723, p<0.05).<br>  3. Isokinetic extensor strength at the ankle, knee and hip joints, normalized to body mass, did not correlate with peak power at the corresponding joint over the propulsion phase. Also, only knee extensor strength at 60 deg/s was correlated with jump distance (r=0.652, p<0.05).<br>  4. Knee extension torque at maximum knee flexion, which is used as an index of countermovement, was correlated with jump distance (r=0.836, p<0.01) and peak knee power (r=0.765, p<0.01). In one participant who had the highest ratio of peak powers over the propulsion phase to isokinetic strength, knee extensor power was enhanced by increasing the knee extension torque with countermovement and coupling of the arm swing to knee extension during the propulsion phase.<br>  Therefore, although the jump distance depended on the lower limb joint powers over the propulsion phase, the power was not directly modulated by isokinetic strength. This phenomenon might be derived from strategies that enhanced lower limb power with countermovement and coupling of the arm swing to lower limb motion.<br>

Journal

Citations (1)*help

See more

References(16)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top