Objectives:The purpose of this study was to compare Lumbo-Pelvic Hip ranges of motion during the Trendelenburg, Single Leg Squat and Corkscrew Tests to walking and to describe the 3-dimensional Lumbo-Pelvic Hip motion during the tests. This may help clinicians to select appropriate tests when examining gait.Methods: An optoelectronic movement analysis tracking system was used to assess the Lumbo-Pelvic Hip region of 14 healthy participants while performing Trendelenburg, Single Leg Squat and Corkscrew Tests and walking. The Lumbo-Pelvic Hip 3-dimensional ranges of movement for the clinical tests were compared to walking using a repeated measures analysis of variance (ANOVA) with pairwise comparisons. Results: No significant differences were found between the pelvic obliquity during the Trendelenburg Test and walking (T Test: L, 11.3 0 +/-4.8, R, 10.8 0 +/-5.0 0 vs Walk: L, 8.3 0 +/-4.8 0 , R 8.3 0 +/-5.1 0 , L, P=.143, R, P=.068). Significant differences were found between the hip sagittal plane range of movement during the Single Leg Squat and walking (SLS: L, 44.2 0 +/-13.7 0 , R, 41.7 0 +/-10.9 0 vs Walk: 38.6 0 +/-7.0, R 37.8 0 +/-5.1 0 ,P<.05),the hip coronal plane range of movement (SLS: L, 9.1 0 +/-5.8, R, 9.0 0 +/-4.6 0 vs Walk: L, 9.4 0 +/-2.3 0 , R 9.5 0 +/-2.0 0 , P<.05), and the hip coronal plane range of movement during the Corkscrew Test and walking (Corkscrew: L, 5.7 0 +/-3.3 0 , R, 5.7 0 +/-3.2 0 vs Walk: L, 9.4 0 +/-2.3 0 , R 9.5 0 +/-2.0 0 , P<.05). Conclusions:The results of the present study showed that, in young asymptomatic participants with no known Lumbo-Pelvic Hip pathology, the pelvic obliquity during the Trendelenburg Test and walking are similar. During the Single Leg Squat the hip moved more in the sagittal plane and less in the coronal plane when compared to walking. There was more movement in the hip transverse plane movement during the Corkscrew Test than during walking. These results suggest for the Trendelenburg Test to be interpreted as normal the pelvis should achieve at least 10 0 of pelvic obliquity, during the Single Leg Squat the hip should move through 43 0 in the sagittal plane and under 10 0 in the coronal plane, and for the Corkscrew Test to be interpreted as normal the hip should move through 6 0 of rotation, and the trunk through 27 0 of rotation.