• Ward JS
• Coats J
• Sorrels K
• Walters M
• Williams T

• Biomechanical Phenomena
• Gait
• Leg Length Inequality
• Locomotion
• Manipulation, Chiropractic
• Sacroiliac Joint

Objective: The purpose of this study was to evaluate the feasibility of engaging in a series of larger studies measuring the effect of sacroiliac joint manipulation on walking kinematics using motion analysis technology.

Methods: Twelve college students engaged in a baseline 90-second gait analysis at 1.5 mph using infrared VICON cameras. Following this, they underwent a prone heel comparison test for functional leg length inequality. Upon examination, participants were then classified as follows: left short leg, right short leg, or no short leg. Participants in each of the 2 short leg branches of this study were then randomized to receive either chiropractic manipulative therapy to the posterior superior iliac spine on the short limb side or no manipulation. Recruitment was ongoing for this pilot study until 1 participant was recruited in each of the following 5 comparative study groups: left short leg—manipulation, left short leg—no manipulation (control 1), right short leg—manipulation, right short leg—no manipulation (control 2), and no short leg (control 3). All participants then underwent another 90-second gait analysis. Data were then grouped and submitted to a blinded biomechanist to determine if there were any unique biomechanical differences between the groups.

Results: No statistically significant differences were measured because of this being a pilot study with a small sample size.

Conclusions: The data from this study indicate that a series of larger studies with this design is feasible.

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