The Effects of Heel Lifts on Dynamic Measures of Gait and Static Posture in Individuals with Parkinson’s disease

Abstract

This study expands upon the Hastings et al (2018) study on the use of heel lifts to change static postural alignment in persons with Parkinson's Disease (PD) and further explores whether the use of heel lifts provide improvements in dynamic gait parameters, Timed Up and Go (TUG) scores, and balance confidence. Outcome measures were taken with and without the heel lifts in place, at two data collection dates. Photographs were analyzed for postural alignment measures using ImageJ software and video was analyzed for gait and turning parameters utilizing the Dite and Temple scale. The Activities-specific Balance Confidence (ABC) scale was collected at baseline and after two weeks of heel lift use, otherwise outcome measures were performed in the reverse order on the first and second session to account for ordering, practice, and fatigue effects. Statistical analysis included paired t-tests for outcome measures and Pearson product correlation between the degree of plantarflexion contracture and ABC scale and overall balance confidence and fall history. We found that head tilt angle and turn time significantly improved (p = .037) (p = .002) with use of heel lifts. Turn time correlated to overall balance confidence (r = -.802, p = .000) and overall balance confidence correlated to fall history (r = -.501, p = .041). This study showed that accommodating a lack of ankle dorsiflexion range of motion with heel lifts significantly improves head tilt angle and decreases turn time as compared to without heel lifts, but has no significant effect on step length, gait speed, or overall TUG score in individuals with PD. Because our work shows that limited range of motion at the ankle contributes to real and perceived balance difficulties healthcare providers working with any population of patients exhibiting balance problems should include this measurement in their assessment and consider intervention with a heel lift when limitations are found.