Spatiotemporal lower-limb asymmetries during stair descent in athletes following anterior cruciate ligament reconstruction

Liebermann, Dario G.Dept. of Physical Therapy, Stanley Steyer School of Health Professions, Faculty of Medicine, Tel Aviv University, Israel (author)

Purpose: This study evaluated motor control recovery at different times following anterior cruciate ligament reconstruction (ACLR) by investigating lower-limb spatiotemporal symmetry during stair descent performances.Methods: We used a cross-sectional design to compare asymptomatic athletes (Controls, n = 18) with a group of people with ACLR (n = 49) divided into three time-from-ACLR subgroups (Early: <6 months, n = 17; Mid: 6–18 months, n = 16; Late: ≥18 months, n = 16). We evaluated: “temporal symmetry” during the stance subphases (single-support, first and second double-support) and “spatial symmetry” for hip-knee-ankle intra-joint angular displacements during the stance phase using a dissimilarity index applied on superimposed 3D phase plots.Results: We found significant between-group differences in temporal variables (p ≤ 0.001). Compared to Controls, both Early and Mid (p ≤ 0.05) showed asymmetry in the first double-support time (longer for their injured vs. non-injured leg), while Early generally also showed longer durations in all other phases, regardless of stepping leg. No statistically significant differences were found for spatial intra-joint symmetry between groups.Conclusion: Temporal but not spatial asymmetry in stair descent is often present early after ACLR; it may remain for up to 18 months and may underlie subtle intra- and inter-joint compensations. Spatial asymmetry may need further exploration.

Markström, Jonas L.,1985-Umeå universitet,Avdelningen för fysioterapi(Swepub:umu)joma0043 (author)
Selling, Jonas,1980-Umeå universitet,Avdelningen för fysioterapi(Swepub:umu)jose0006 (author)
Häger, Charlotte K.,Professor,1962-Umeå universitet,Avdelningen för fysioterapi(Swepub:umu)chha0003 (author)
Dept. of Physical Therapy, Stanley Steyer School of Health Professions, Faculty of Medicine, Tel Aviv University, IsraelAvdelningen för fysioterapi (creator_code:org_t)

By the author/editor: Liebermann, Dari ...; Markström, Jonas ...; Selling, Jonas, ...; Häger, Charlotte ...

About the subject

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Health Sciences; and Physiotherapy

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