Validation of MOTI sensor in relation to Return to Sport criteria for dynamic stability in ACL injuries
Author
Andersen, Vetle Pettersen
Term
4. Semester
Publication year
2021
Abstract
ACL-skader er hyppige, og mange vender ikke tilbage til sport eller risikerer reinjury, hvilket sætter fokus på bedre kriterier for Return to Sport (RTS), herunder objektive mål for dynamisk stabilitet. Dette projekt undersøgte, om den bærbare MOTI-sensor kan måle dynamisk stabilitet (TTS) ved enkeltbenslandinger med tilstrækkelig reliabilitet og validitet sammenlignet med en kraftplatform (guldstandard). I et tværsnitsdesign gennemførte 30 raske deltagere tre forsøg af tre landingstyper (fremad-, side- og droplanding) på en kraftplatform, mens MOTI var placeret på lænden; TTS blev beregnet for hver bevægelse. Test-retest reliabilitet og validitet blev vurderet med standard statistiske metoder og aftaleanalyser. MOTI viste dårlig reliabilitet på tværs af bevægelser (ICC 0,269–0,491) og dårlig validitet sammenlignet med kraftplatformen (ICC 0,191–0,413) med brede grænser for overensstemmelse; sensoren undervurderede TTS let i fremad- og droplanding og signifikant i sidelanding. Kraftplatformen havde tilsvarende lav reliabilitet mellem forsøg, bortset fra moderat reliabilitet i sidelanding. Samlet set er MOTI i sin nuværende form ikke et pålideligt eller gyldigt redskab til at vurdere dynamisk stabilitet via TTS ved enkeltbenslandinger og bør ikke anvendes til RTS-beslutninger efter ACL-skade uden yderligere udvikling.
Anterior cruciate ligament (ACL) injuries are common, with many athletes not returning to sport or facing reinjury, highlighting the need for better Return to Sport (RTS) criteria that include objective measures of dynamic stability. This project evaluated whether the wearable MOTI sensor can measure dynamic stability (TTS) during single-leg landings with adequate reliability and validity compared to a force platform (gold standard). In a cross-sectional lab study, 30 healthy participants completed three trials of three landing tasks (forward, side, and drop) onto a force platform while wearing MOTI on the lower back; TTS was computed for each movement. Test-retest reliability and validity were assessed using standard statistical approaches and agreement analyses. MOTI showed poor reliability across movements (ICC 0.269–0.491) and poor validity against the force platform (ICC 0.191–0.413) with wide limits of agreement; the sensor slightly underestimated TTS in forward and drop landings and significantly underestimated in side landings. The force platform itself showed similarly low between-trial reliability except moderate reliability in side landings. Overall, MOTI in its current form is not a reliable or valid tool for assessing dynamic stability via TTS in single-leg landings and should not be used for RTS decision-making after ACL injury without further refinement.
[This summary has been generated with the help of AI directly from the project (PDF)]
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