Identifikation von Bewegungsphänotypen bei Beuge- und Streckbewegungen des humanen Kniegelenks

Erik Schrödter

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Abstract

Human motion is highly recognisable because of its individual character. The concept of movement phenotypes can fuse the two established ideas of the preferred movement path – a concept of individual and energetical- ly optimal joint motion – and functional groups – a concept of functional requirements on external equipment. Thereby groups of people with simi- lar individual movement strategies could possibly be identified. In a cross sectional study knee joint motion in 81 healthy people was analysed, bare- footed in four different knee bending motions (leg swing during walking, knee-lift, two legged squat, stair ascend & descend). Anthropometrics were acquired and movement data was analysed with a functional princi- pal component analysis and subsequent cluster analysis. Each of the four movement tasks showed significantly different movement phenotypes. Especially in squatting and knee-lifting the movement phenotypes dis- played rather different movement concepts throughout the major planes of motion. Participants affiliated with the movement phenotypes appeared to deviate noticeably between one another. It is possible that more da- tasets of more people could further differentiate or concretize movement phenotypes. Static transverse plane knee joint rotation and thigh circum- ference were shown to be possible determinants of phenotype affiliation. Increased static inward knee rotation shifted movement execution towards knee inward rotation as well. Thigh circumference was mostly associated with frontal plane joint motion and could be considered hinting at quad strength influence on knee joint motion within the frontal plane. Furthermore, there seems to be a cross-movement motion strategy, especially for closed chain exercises, which is being modified to the need of the specific movement task. Movement tasks in this study were similar, but not enough so to determine movement in one task by analysing another. Find- ings in this study could present a framework to further differentiate movement phenotypes for those movement tasks, identify movement phenotypes for other movement tasks, as well as investigate determinants of phenotype affiliation. Lower extremity muscle strength should be close- ly examined in this regard. Also considering distal and proximal influences on knee joint motion, which were outside the focus of this work, could contribute to a better understanding of movement phenotypes of knee joint motion. The concept of movement phenotypes shows a great poten- tial to display a broad variety of possible movement strategies for a given movement task. Key findings - All four movement tasks show significantly different movement phenotypes, partly with rather different movement execution - Transverse plane static leg rotation and thigh circumference appear to be determinants of phenotype affiliation - The four movements show similarities in knee joint motion – not adequate enough to accurately predict one another’s knee joint mo- tion
Original languageGerman
Place of PublicationKöln
PublisherDeutsche Sporthochschule Köln
Number of pages213
Publication statusPublished - 2022

Citation