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Bottom-Up Kinetic Chain in Drop Landing among University Athletes with Normal Dynamic Knee Valgus

Author

Listed:
  • Nazatul Izzati Jamaludin

    (Exercise & Sports Science Programme, School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia)

  • Farhah Nadhirah Aiman Sahabuddin

    (Exercise & Sports Science Programme, School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia)

  • Raja Khairul Mustaqim Raja Ahmad Najib

    (Exercise & Sports Science Programme, School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia
    Department of Mathematics and Science Education, Faculty of Education, University of Malaya, Kuala Lumpur 50603, Malaysia)

  • Muhamad Lutfi Hanif Shamshul Bahari

    (Exercise & Sports Science Programme, School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia)

  • Shazlin Shaharudin

    (Exercise & Sports Science Programme, School of Health Sciences, Universiti Sains Malaysia, Kubang Kerian 16150, Kelantan, Malaysia)

Abstract

The study investigated the influence of ankle strength and its range of motion (ROM) on knee kinematics during drop landing. Fifteen male and fifteen female university athletes with a normal range of dynamic knee valgus (DKV) (knee frontal plane projection angle: men = 3° to 8°, females = 7° to 13°) were recruited. They performed drop landing at height 30 cm and 45 cm with three-dimensional motion capture and analysis. Knee angles were compared at specific landing phases. Isokinetic ankle strength was tested at 60°/s angular velocity while the weight-bearing lunge test was conducted to evaluate ankle ROM. For males, strength for both plantarflexors and dorsiflexors were associated with knee kinematics at both heights (30 cm: r = −0.50, p = 0.03; 45 cm: r = −0.45, p = 0.05) during maximum vertical ground reaction force (MVGRF) phase. For females, ankle invertor strength and knee kinematics were associated at both 30cm (r = 0.53; p = 0.02,) and 45 cm landing heights (r = 0.49, p = 0.03), while plantarflexor strength and knee kinematics showed a significant association during initial contact (r = 0.70, p < 0.01) and MVGRF (r = 0.55, p = 0.02) phases at height 30 cm only. Male and female athletes with normal range of DKV showed a significant relationship between ankle strength and knee kinematics at specific landing phases. These relationships varied with increased landing height.

Suggested Citation

  • Nazatul Izzati Jamaludin & Farhah Nadhirah Aiman Sahabuddin & Raja Khairul Mustaqim Raja Ahmad Najib & Muhamad Lutfi Hanif Shamshul Bahari & Shazlin Shaharudin, 2020. "Bottom-Up Kinetic Chain in Drop Landing among University Athletes with Normal Dynamic Knee Valgus," IJERPH, MDPI, vol. 17(12), pages 1-10, June.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:12:p:4418-:d:373824
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    References listed on IDEAS

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    1. Yi Wang & Wing-Kai Lam & Cheuk-Hei Cheung & Aaron Kam-Lun Leung, 2020. "Effect of Red Arch-Support Insoles on Subjective Comfort and Movement Biomechanics in Various Landing Heights," IJERPH, MDPI, vol. 17(7), pages 1-12, April.
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    Cited by:

    1. Riccardo Di Giminiani & Aldo Giovannelli & Lorenzo Capuano & Pascal Izzicupo & Andrea Di Blasio & Francesco Masedu, 2020. "Neuromuscular Strategies in Stretch–Shortening Exercises with Increasing Drop Heights: The Role of Muscle Coactivation in Leg Stiffness and Power Propulsion," IJERPH, MDPI, vol. 17(22), pages 1-15, November.

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