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MEDICINA DELLO SPORT
A Journal on Sports Medicine
Official Journal of the Italian Sports Medicine Federation
Indexed/Abstracted in: BIOSIS Previews, EMBASE, Science Citation Index Expanded (SciSearch), Scopus
Impact Factor 0,163
ORTHOPAEDIC AND TRAUMATOLOGICAL SECTION
Medicina dello Sport 2001 September;54(3):219-28
Effects on static and dynamic ankle stabilization while using orthoses
Astegiano P., Ganzit G. P., Gola P., Stefanini L.
Istituto di Medicina dello Sport FMSI-CONI, Torino
Background. Ankle sprains are the most frequent traumas in sports. The incidence varies greatly depending on the sport, being higher in basketball (incidence rate 21 to 45%), volleyball (25 to 54%) and soccer (17 to 31%). Furthermore, ankle sprains are prone to relapse- up to 80% in volleyball and 67% in soccer players.
Aim of this work was to evaluate the performances of the gradual GIBAUD Ortho brace in stabilizing the ankle joint and subtalar joint in both prevention and rehabilitation, thus improving the proprioceptive response.
Methods. 30 patients, both male and female, aged 18-45, were studied. 10 patients had no reported pathology concerning the lower limbs (normal); 10 patients reported one or more ankle sprains in their clinical history but resulted asymptomatic while undergoing the test (chronic), 10 patients reported an acute ankle sprain in the rehabilitation phase, such as to allow slow straight running (acute). The following functional tests have been were performed: a) Static tests: the unilateral stance (Flamingo-test) was evaluated measuring postural sway with a Kistler force platform. b) Dynamic tests: the component in the three space planes of the resultant of the forces applied to the ground while walking and running on a Kistler force platform was evaluated. In the case of walking the test was performed at a speed of 6 km/h, and in running at speeds of 12 and 18 km/h. For the static analysis of data, the variance analysis for repeated measures was adopted.
Results. In the patients with acute ankle sprains, use of the gradual brace corresponded to a significant decrease in both the postural sway area (from 6080 to 4344 mm2) and the average sway velocity (from 46 to 39 mm/s). In the case of walking the time of foot contact to with the ground in acute patients is was reduced (from 623 to 610 ms), as also was the component of transversal forces (from 213 to 133 N force peak). With running, use of the gradual brace confirms only in part the changes noticed in walking. In chronic patients changes were less evident and in normal patients none at all. All tests performed hint to a particular effect derived from using the gradual elastic GIBAUD brace, both in a static and dynamic postural phase, varying with reference to the patients’ characteristics.
Conclusions. Part of the progress in the patients examined seems to stem from a greater sense of safety in patients using the brace. Using the gradual brace seems to improve the proprioceptive response by possibly stimulating the mechanoreceptors.