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Biomechanics of step-off drop landings are affected by limb dominance and lead limb in task initiation.

This study examines the effects of limb dominance and lead limb in task initiation on the kinetics and kinematics of step-off drop landings. Nineteen male participants performed drop landings led by the dominant and non-dominant limbs at 45-cm and 60-cm drop heights. Ground reaction force (GRF) and...

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Published in:Journal of Sports Sciences Vol. 42; no. 12; pp. 1147 - 1157
Main Authors: Kong, Pui Wah, Tang, Yunqi, Lam, Wing-Kai
Format: pictorial research tables/charts Journal Article
Published: Taylor & Francis Ltd Jun2024
Online Access:View this record in EBSCOhost
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        02640414
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      jtl: Journal of Sports Sciences
      issn: 02640414
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      dt: Jun2024
      vid: 42
      iid: 12
      pid: 377
      pub: Taylor & Francis Ltd
      place: Philadelphia, Pennsylvania
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        179022974
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        10.1080/02640414.2024.2386211
        179022974
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        atl: Biomechanics of step-off drop landings are affected by limb dominance and lead limb in task initiation.
      aug:
        au:
          Kong, Pui Wah
          Tang, Yunqi
          Lam, Wing-Kai
        affil: Physical Education and Sports Science, National Institute of Education, Nanyang Technological University, Singapore
      sug:
        subj:
          Step
          Jumping
          Lower Extremity Physiology
          Dominance, Cerebral
          Biomechanics Evaluation
          Task Performance and Analysis
          Human
          Male
          Kinetics
          Kinematics
          Ground Reaction Force
          Two-Way Analysis of Variance
          Repeated Measures
          Ankle Joint Physiopathology
          Male
      ab: This study examines the effects of limb dominance and lead limb in task initiation on the kinetics and kinematics of step-off drop landings. Nineteen male participants performed drop landings led by the dominant and non-dominant limbs at 45-cm and 60-cm drop heights. Ground reaction force (GRF) and lower body kinematic data were collected. Between-limb time differences at the initial ground contact were calculated to indicate temporal asymmetry. Statistical Parametric Mapping (SPM) was applied for waveform analysis while two-way repeated measures ANOVA was used for discrete parameters. SPM results revealed greater GRF and lesser ankle dorsiflexion in the lead limb compared to the trail limb in 3 out of 4 landing conditions. The dominant limb displayed a greater forefoot loading rate (45 cm: p=.009, ηp2 = 0.438; 60 cm: p=.035, ηp2 = 0.225) and greater ankle joint quasi-stiffness (45 cm: p <.001, ηp2 = 0.360; 60 cm: p <.001, ηp2 = 0.597) than the non-dominant limb. Not all 380 trials were lead-limb first landings, with a smaller between-limb time difference (p=.009, d = 0.60) at 60 cm (4.1 ± 2.3 ms) than 45 cm (5.6 ± 2.7 ms). In conclusion, the step-off drop landing is not an ideal protocol for examining bilateral asymmetry in lower limb biomechanics due to potential biases introduced by limb dominance and the step-off limb.
      pubtype: Academic Journal
      doctype:
        pictorial
        research
        tables/charts
        Journal Article
      ougenre: Article
    language: English
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