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  • Title: Sagittal plane kinematic differences between dominant and non-dominant legs in unilateral and bilateral jump landings.
    Author: McPherson AL, Dowling B, Tubbs TG, Paci JM.
    Journal: Phys Ther Sport; 2016 Nov; 22():54-60. PubMed ID: 27583649.
    Abstract:
    CONTEXT: In both research and clinical settings there is an assumption of symmetry between limbs in landing. However, development of a preferred limb side is a natural occurrence. It is not well established how limb dominance affects landing mechanics in a unilateral or bilateral landing. OBJECTIVE: To investigate sagittal plane mechanics between dominant and non-dominant legs in both unilateral and a bilateral landing tasks. DESIGN: Cross-sectional study. SETTING: Laboratory environment. PARTICIPANTS: 148 male athletes. MAIN OUTCOME MEASURES: Sagittal plane kinematics (hip, knee, and ankle flexion) at initial contact and maximum knee flexion, and total excursion of the movement. RESULTS: No significant differences were found between limbs in the unilateral landing. Knee flexion (p = 0.02) and hip flexion (p = 0.00) were significantly different between dominant and non-dominant limbs at initial contact in the bilateral landing. Knee flexion total excursion (p = 0.04) and hip flexion total excursion (p = 0.03) in the bilateral landing were also significantly different between limbs. CONCLUSIONS: Lower limb symmetry was observed for the unilateral landing. Minimal, yet significant, asymmetries (less than 2°) were present during the bilateral landing. This finding justifies the continued use of the dominant limb in research and clinical settings.
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