BackgroundWhether hip range of motion (ROM) is a risk factor for groin pain in athletes is not known.ObjectivesTo systematically review the relationship between hip ROM and groin pain in athletes in cross-sectional/case–control and prospective studies.Study designSystematic review, prospectively registered (PROSPERO) according to PRISMA guidelines.MethodsPubmed, Embase, CINAHL and SPORTDiscus were systematically searched up to December 2015. Two authors performed study selection, data extraction/analysis, quality assessment (Critical Appraisal Skills Programme) and strength of evidence synthesis.ResultsWe identified seven prospective and four case–control studies. The total quality score ranged from 29% to 92%. Heterogeneity in groin pain classification, injury definitions and physical assessment precluded data pooling. There was strong evidence that total rotation of both hips below 85° measured at the pre-season screening was a risk factor for groin pain development. Strong evidence suggested that internal rotation, abduction and extension were not associated with the risk or presence of groin pain.ConclusionTotal hip ROM is the factor most consistently related to groin pain in athletes. Screening for hip ROM is unlikely to correctly identify an athlete at risk of developing groin pain because of the small ROM differences found and poor ROM measurement properties.

All studies showed that walking exercises improved walking distance in patients with intermittent claudication. Further research is needed to determine the optimal exercise program, the effect of adherence to the treatment protocol, and the duration of the effects following a formal exercise program.

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