Relationship between functional classification, upper extremity muscle strength, and agility in wheelchair rugby athletes

ABSTRACT This study aimed to compare the strength and agility of wheelchair rugby (WR) athletes with different functional classifications (FC) and describe the relationship between agility and upper extremity isometric muscle strength (IMS). A total of 10 WR athletes were analyzed, divided into two groups: Group 1 (G1): FC 0.5 and 1.0; and Group 2(G2): FC 1.5 to 2.5. IMS was evaluated by a dynamometer, and agility by a zig-zag test. Spearman’s correlation was used to describe the relationship between IMS and performance on the agility test. In contrast, the t-test was used to compare strength and agility between different FCs (p≤0.05). Shoulder extensor IMS was higher in G2 athletes (p=0.001; d=3.10), which were also more agile than G1 athletes (G1=23.66s>G2=17.55s; p=0.015; d=2.00). Both groups showed a correlation between bilateral shoulder extensor strength and agility (r=−0.721; p=0.019). Athletes with high FC scores are more agile than athletes with low scores and, therefore, have greater movement speed when performing WR tasks. Greater shoulder extensor muscle strength is associated with greater agility in WR athletes.