Classifying trunk strength impairment according to the activity limitation caused in wheelchair rugby performance

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Bibliographic Details
Title translated into German:Klassifizierung der Beeinträchtigung der Rumpfstärke entsprechend der Aktivitätsbeschränkung, die durch die Rollstuhlrugby-Leistung verursacht wird
Author:Altmann, V.C.; Groen, B.E.; Hart, A.L.; Vanlandewijck, Y.C.; Keijsers, N.L.W.
Published in:Scandinavian journal of medicine & science in sports
Published:28 (2018), 2, S. 649-657, Lit.
Format: Publications (Database SPOLIT)
Publication Type: Journal article
Media type: Electronic resource (online) Print resource
ISSN:0905-7188, 1600-0838
Online Access:
Identification number:PU201803001738

Author's abstract

International Federations in Paralympic sports should develop evidence-based classification, based on the relative strength of association between impairment and activities that determine sport-specific performance. The purpose of the current study was to assess the relationship between trunk strength impairment and three activities that determine performance in wheelchair rugby, and to determine whether this relationship supports the concept of “natural classes.” Trunk muscle strength and three determinants of performance were assessed in 27 athletes. The correlations between lateral trunk muscle strength and the determinant tilting the chair, and between forward trunk muscle strength and the determinants 1 m acceleration and sprint momentum were calculated. To group athletes based on impairment, K-means cluster analysis was used to group athletes according to how much trunk muscle strength affected the activities. There were significant, moderate to strong correlations between left-right strength and chair tilting (r=.50), between forward strength and 1 m acceleration (r=.59), and between forward strength and sprint momentum (r=.79). Cluster analysis indicated at least one cut-point in performance with a decrease in impairment in all three wheelchair activities, supporting the concept of “natural classes.”