The Japanese Journal of Ergonomics
Online ISSN : 1884-2844
Print ISSN : 0549-4974
ISSN-L : 0549-4974
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Volume 51, Issue 3
Displaying 1-12 of 12 articles from this issue
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General remarks
Contribution
  • Estimation of the Anterior Cruciate Ligament Load in the Forward and the Backward Stair Descent
    Tomoya TAKABAYASHI, Takuma INAI, Erika YOKOYAMA, Mutsuaki EDAMA, Yuta ...
    2015 Volume 51 Issue 3 Pages 200-206
    Published: June 15, 2015
    Released on J-STAGE: July 14, 2016
    DOIhttps://doi.org/10.5100/jje.51.200
    JOURNAL FREE ACCESS
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    The purposes of this study were to estimate the load to the anterior cruciate ligament (ACL) in the forward and the backward stair descent and to discuss clinical implementation of the findings. Six healthy young males participated in this study. The tasks were forward and backward stair descent. The muscle tensions were estimated based on the electromyography-assisted optimization. The ACL load was derived from the estimated muscle tensions. The peak ACL load in the backward stair descent was significantly lower than that in the forward stair descent (2.6 ± 0.6 N/kg, 3.2 ± 1.0 N/kg, respectively; p>0.05). Also, the peak anterior shear force in the backward stair descent was significantly lower compared to the forward stair descent (1.3 ± 0.6 N/kg 2.4 ± 0.8 N/kg, respectively; p>0.05). The reduction of ACL load and anterior shear force observed in the backward stair descent may indicate that the backward stair descent would be one of recommended activities.
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