Vertical Drop Jump Performance in Youth With Juvenile Idiopathic Arthritis.

Autor: Kuntze G; University of Calgary, Calgary, Alberta, Canada., Nettel-Aguirre A; Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada., Brooks J; Alberta Children's Hospital, Calgary, Alberta, Canada., Esau S; University of Calgary, Calgary, Alberta, Canada., Nesbitt C; University of Calgary, Calgary, Alberta, Canada., Mosher D; Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada., Twilt M; Cumming School of Medicine, University of Calgary, and Alberta Children's Hospital, Calgary, Alberta, Canada., Benseler S; Cumming School of Medicine, University of Calgary, and Alberta Children's Hospital, Calgary, Alberta, Canada., Ronsky JL; University of Calgary, Calgary, Alberta, Canada., Emery CA; Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
Jazyk: angličtina
Zdroj: Arthritis care & research [Arthritis Care Res (Hoboken)] 2021 Jul; Vol. 73 (7), pp. 955-963.
DOI: 10.1002/acr.24219
Abstrakt: Objective: Juvenile idiopathic arthritis (JIA) is associated with altered body structure and function outcomes that may expose youth with JIA to a greater risk of secondary joint injury. This study aimed to examine differences in vertical drop jump (VDJ) biomechanics for youth with JIA and healthy youth (control group).
Methods: The present study was a matched pair cohort study. Youth with JIA (n = 30) and their age- and sex-matched control peers participated in this ethics-approved study. Lower-extremity biomechanics information was obtained using a motion analysis system (Motion Analysis) and 2 force plates (AMTI). Biomechanics outcomes included hip, knee, and ankle joint angles, ground reaction forces (GRF), and VDJ phase durations. Other outcomes included disease activity, physical disability, and sports participation. Matched pairs data (JIA-control) were analyzed using a multivariate random coefficient model (version 3.5.0, R Core Team; joint angles, potential confounders) and paired samples t-tests with Bonferroni correction (α = 0.0125; GRF, VDJ phase durations).
Results: Youth with JIA had low disease activity, pain, and disability scores. Youth with JIA maintained a more erect posture at the hip (β = -4.0°, P = 0.004), knee (β = 7.5°, P = 0.004) and ankle (β = -2.6°, P = 0.001). GRF and phase durations outcomes did not meet criteria for significant differences. Knee extension increased with participant age (β = -1.0°, P = 0.002), while female participants displayed greater hip flexion (β = -6.6°, P = 0.001) and less ankle dorsiflexion (β = 2.3°, P = 0.006).
Conclusion: This study provides evidence for a stiff knee landing strategy by youth with JIA. These findings inform targets for physical therapy management to mitigate the risks of a secondary joint injury in sports participation.
(© 2020, American College of Rheumatology.)
Databáze: MEDLINE
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