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The effects of joint hypermobility syndrome on the kinematics and kinetics of the vertical jump test

Alsiri, Najla; Cramp, Mary; Barnett, Sue; Palmer, Shea


Najla Alsiri

Mary Cramp
Portfolio Lead: Health and Social Wellbeing Research

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Shea Palmer
Professor in Allied Health Professions


Purpose: Biomechanical impairments are not apparent during walking in people with Joint Hypermobility Syndrome (JHS). This research explored biomechanical alterations during a higher intensity task, vertical jumping. Materials and methods: This cross-sectional study compared a JHS group (n = 29) to a healthy control group (n = 30). Joint kinematics and kinetics were recorded using a Qualisys motion capture system synchronized with a Kistler platform. Independent sample t-tests and standardised mean differences (SMD) were used for statistical analysis. Results: No significant statistical or clinical differences were found between groups in joint kinematics and jump height (p ≥ 0.01). Sagittal hip and knee peak power generation were statistically lower in the JHS group during the compression phase (p ≤ 0.01), but not clinically relevant (SMD < 0.5). Clinically relevant reductions were found in the JHS group knee and ankle peak moments during the compression phase, and hip and knee peak power generation during the push phase (SMD ≥ 0.5), although these were not statistically significant (p ≥ 0.01). Conclusion: The JHS group achieved a similar jump height but with some biomechanical alterations. Further understanding of the joint biomechanical behavior could help to optimize management strategies for JHS, potentially focusing on neuromuscular control and strength/power training.


Alsiri, N., Cramp, M., Barnett, S., & Palmer, S. (2020). The effects of joint hypermobility syndrome on the kinematics and kinetics of the vertical jump test. Journal of Electromyography and Kinesiology, 55,

Journal Article Type Article
Acceptance Date Oct 9, 2020
Online Publication Date Oct 13, 2020
Publication Date Dec 1, 2020
Deposit Date Oct 12, 2020
Publicly Available Date Oct 14, 2021
Journal Journal of Electromyography and Kinesiology
Electronic ISSN 1873-5711
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 55
Article Number 102483
Keywords Joint Hypermobility Syndrome, kinematics, gait, vertical jump, three-dimensional
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