The Influence of Hop Width during the Crossover Hop Test

Document Type


Publication Date



Physical Therapy


The purpose of this study is to assess the influence of hop width on performance of the crossover hop test (XHOP). Methods: This repeated measures study evaluated hop distance during four different XHOP conditions of varying hop width: 2.54 cm (narrow), 15 cm (standard), 12.5% of height (HT1), and 25% of height (HT2). Hop width and limb order were randomized prior to testing. A single examiner recorded hop distance. A repeated measures ANOVA evaluated differences in hop distance for the main effect of condition (narrow, standard, HT1, and HT2). Results/Findings: Twenty-four physically active females without history of ligamentous knee injury completed testing procedures (age: 21.8 ± 3.7 years, height: 1.7 ± 0.1 m, mass: 66.9 ± 10.6 kg). Hop width conditions normalized to 12.5 and 25% of participant's height revealed a mean hop width of 21.3 ± 0.9 cm (HT1) and 42.5 ± 1.8 cm (HT2), respectively. Preliminary results indicate differences in hop distance for the main effect of condition, F(1,23) = 16.8, p < 0.001. Post hoc tests identified differences in hop distance between narrow and HT2 (p = 0.004), standard and HT2 (p = 0.001), and HT1 and HT2 (p = 0.006) conditions, respectively. Discussion: Preliminary findings revealed no differences in hop distance between XHOP narrow and standard conditions in healthy females. Decreased hop distance was found when hop width was normalized to 25% of participant height in comparison to all other test conditions. Further research is indicated to better understand the clinical implications of normalizing the XHOP for return to sport decision making.

First Advisor

Brandon Ness

Second Advisor

Kory Zimney

Research Area

Physical Therapy

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