EFFECT OF SLIP PATCHES ON FOOTCONTACT MECHANICS DURING A HANDBALL MOVEMENT
Authors
Frank, Ádám ; Dziewiecki, Michal
Term
4. semester
Education
Publication year
2016
Submitted on
2016-12-05
Pages
15
Abstract
Formålet var at undersøge, hvordan Spraino-skridplastre påvirker fod-underlag-interaktionen under en håndboldspecifik retningsændring. Ni kvindelige elite-håndboldspillere udførte et sidesteg, mens de modtog en aflevering, iført den samme håndboldsko med fire forskellige konfigurationer: to placeringer af en original patch på ydersålen (1 cm over kanten og 3 mm som anbefalet), en ny sinusformet patch samt en kontrolopsætning uden patch på ydersålen. Bevægelsen blev registreret med 3D-bevægelsesanalyse og kraftplader, og inverse dynamiske beregninger blev brugt til at beregne fodkræfter (ground reaction forces), ankelvinkler og -momenter i den tidlige og sene del af fodkontakten. Tyve relevante variabler, herunder kontakttid og maksimal vertikal ground reaction force, blev sammenlignet mellem betingelser med repeated-measures ANOVA. Resultatet viste ingen signifikante forskelle mellem patch-betingelserne eller i forhold til kontrol for nogen af de målte kræfter, ankelkinematik eller ankelmomenter, og bevægelsesteknikken syntes uændret; data viste desuden stor variation mellem forsøg. Inden for denne opgave og dette deltagergrundlag ændrede Spraino således ikke målbare fodkontaktmekanikker; fremtidige studier bør afprøve andre spillerhandlinger og inkludere præstationsrelevante mål for at vurdere anvendeligheden i træning og kamp.
This study examined how Spraino slip patches affect foot-surface interaction during a handball-specific change of direction. Nine female elite handball players performed a side-cut while receiving a pass, wearing the same handball shoe in four configurations: two placements of an original outsole patch (1 cm over the lateral edge and 3 mm as recommended), a new sinusoidal-edged patch, and a control setup without an outsole patch. Movement was captured with 3D motion analysis and force plates, and inverse dynamics was used to compute ground reaction forces, ankle joint angles, and moments during early and late contact. Twenty variables of interest, including contact time and peak vertical ground reaction force, were compared across conditions using repeated-measures ANOVA. The results showed no significant differences between any patch condition and control for ground reaction forces, ankle kinematics, or ankle moments, and movement technique appeared unaltered; considerable variability across trials was observed. Within this task and sample, Spraino did not measurably change foot-contact mechanics; future work should assess other player actions and include performance-relevant outcomes to determine applicability to training and games.
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