Abstract
Lateral ankle sprains have a high recurrence rate, often developing into chronic
ankle instability (CAI). CAI affects movement strategy during side-cutting
maneuvers, with inconsistent results in many studies. This study aimed to
clarify the characteristics of movement strategies during side-cutting maneuvers
in female soccer players with and without CAI. Thirteen female soccer players
with CAI and twelve healthy controls performed 10 successful trials of
side-cutting maneuvers in three directions (anterolateral, lateral, and
posterolateral) under unanticipated conditions. Compared to the control group,
the CAI group displayed an increased stance time in the lateral and
posterolateral side-cutting maneuvers (lateral: p=0.021, effect size=0.97,
posterolateral: p=0.014, effect size=1.00). In posterolateral side-cutting
maneuvers, the CAI group displayed a decreased posterior ground reaction force
at 19–30% and 42–54% of the entire stance phase compared with the control group
(p=0.001, effect size=1.30–1.42). Female soccer players with CAI may display
increased stance time to compensate for self-reported ankle instability and may
also exhibit decreased braking and propulsive force when side-cutting to sharper
angles. These observations suggest a hypothesis that could help in the
assessment of cutting maneuvers under unanticipated conditions after ankle
sprains.
Keywords
lateral ankle sprain - anticipation - cutting maneuvers - movement strategies - chronic
ankle instability