ArticleJournal of foot and ankle research2026
Ankle Kinematics and Neuromuscular Activity During the Stair-to-Ground Transition in Individuals With Acute Ankle Sprain: A Cross-Sectional Study.
Article in Journal of foot and ankle research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundEvidence regarding the biomechanics of stair-to-ground transitions after acute ankle sprain (AAS) remains limited. This study examined ankle kinematics, center-of-mass (COM) displacement, muscle activation, and intermuscular coherence during this transition.
methodsThirty individuals with AAS and 30 healthy controls completed the task while motion-capture, force-plate, and surface electromyography data were collected. Ankle kinematics were derived from motion capture, and COM displacement was obtained using a participant-scaled OpenSim model. Trial-level outcomes were averaged within each participant.
resultsAt initial contact, the AAS group showed an ankle position that was 1.622° more plantarflexed and 2.661° more internally rotated than that of the control group. Transverse-plane COM displacement was 0.004 m lower in the AAS group (p = 0.011), whereas ankle range of motion did not differ between groups. Mean biceps femoris activation was lower, whereas mean medial gastrocnemius and tibialis anterior activation and peak tibialis anterior and soleus activation were higher in the AAS group (p < 0.05). In the AAS group, global efficiency, clustering coefficient, and network density were higher in the 0-25 Hz band than in the 25-50 Hz band (p < 0.05).
conclusionsAAS was associated with altered ankle posture at initial contact, a smaller transverse-plane COM displacement amplitude, and differences in selected muscle-activation outcomes during the stair-to-ground transition.
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