Healthy subjects with lax knees use less knee flexion rather than muscle control to limit anterior tibia translation during landing.

Autor: Keizer MNJ; Center for Human Movement Sciences, University of Groningen, University Medical Center Groningen, UMCG sector F, FA 23, PO Box 219, Groningen, 9713AV, The Netherlands. m.n.j.keizer@umcg.nl., Hijmans JM; Department of Rehabilitation Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands., Gokeler A; Center for Human Movement Sciences, University of Groningen, University Medical Center Groningen, UMCG sector F, FA 23, PO Box 219, Groningen, 9713AV, The Netherlands.; Luxembourg Institute of Research in Orthopedics, Sports Medicine and Science (LIROMS), Luxembourg, Luxembourg.; Department Exercise & Health, Exercise Science and Neuroscience, University of Paderborn, Paderborn, Germany., Benjaminse A; Center for Human Movement Sciences, University of Groningen, University Medical Center Groningen, UMCG sector F, FA 23, PO Box 219, Groningen, 9713AV, The Netherlands.; School of Sport Studies, Hanze University Groningen, Groningen, The Netherlands., Otten E; Center for Human Movement Sciences, University of Groningen, University Medical Center Groningen, UMCG sector F, FA 23, PO Box 219, Groningen, 9713AV, The Netherlands.
Jazyk: angličtina
Zdroj: Journal of experimental orthopaedics [J Exp Orthop] 2020 May 15; Vol. 7 (1), pp. 32. Date of Electronic Publication: 2020 May 15.
DOI: 10.1186/s40634-020-00246-6
Abstrakt: Purpose: It has been reported that there is no correlation between anterior tibia translation (ATT) in passive and dynamic situations. Passive ATT (ATTp) may be different to dynamic ATT (ATTd) due to muscle activation patterns. This study aimed to investigate whether muscle activation during jumping can control ATT in healthy participants.
Methods: ATTp of twenty-one healthy participants was measured using a KT-1000 arthrometer. All participants performed single leg hops for distance during which ATTd, knee flexion angles and knee flexion moments were measured using a 3D motion capture system. During both tests, sEMG signals were recorded.
Results: A negative correlation was found between ATTp and the maximal ATTd (r = - 0.47, p = 0.028). An N-Way ANOVA showed that larger semitendinosus activity was seen when ATTd was larger, while less biceps femoris activity and rectus femoris activity were seen. Moreover, larger knee extension moment, knee flexion angle and ground reaction force in the anterior-posterior direction were seen when ATTd was larger.
Conclusion: Participants with more ATTp showed smaller ATTd during jump landing. Muscle activation did not contribute to reduce ATTd during impact of a jump-landing at the observed knee angles. However, subjects with large ATTp landed with less knee flexion and consequently showed less ATTd. The results of this study give information on how healthy people control knee laxity during jump-landing.
Level of Evidence: III.
Databáze: MEDLINE
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