Intra and intersession repeatability and reliability of dynamic parameters in pressure platform assessments on subjects with simulated leg length discrepancy. A cross-sectional research

Abstract

BACKGROUND: Leg length discrepancy (LLD) may play a key role in exercise biomechanics. Although the Podoprint platform has been used in dynamic pressure studies, there are no data regarding the reliability and repeatability of dynamic measurements under simulated LLD conditions. OBJECTIVES: To determine the intra and intersession repeatability and reliability of dynamic parameters of the Podoprint pressure platform under simulated LLD conditions. DESIGN AND SETTING: Observational cross-sectional study at a public university. METHODS: Thirty-seven healthy volunteers participated in this study. LLD was simulated using ethyl vinyl acetate plantar lifts with heights of 5 mm, 10 mm, 15 mm and 20 mm located under the right shoe of each volunteer. The procedure was performed to capture the dynamic parameters of each participant under five different simulated LLD conditions. Stance time, mean pressure and peak pressure measurements were registered in three trials for each foot and each LLD level. Data were collected during two separate testing sessions, in order to establish intrasession and intersession reliability. RESULTS: The intraclass correlation coefficients (ICCs) for intrasession reliability ranged from 0.775 to 0.983 in the first session and from 0.860 to 0.985 in the second session. The ICCs for intersession reliability ranged from 0.909 to 0.990. Bland-Altman plots showed absence of systematic measurement errors. CONCLUSIONS: The results from this study indicate that the Podoprint platform is a reliable system for assessing dynamic parameters under simulated LLD conditions. Future studies should evaluate plantar pressures under LLD conditions, in association with exercise, biomechanics and musculoskeletal disorders.

The Effect of Simulated Leg-Length Discrepancy on the Dynamic Parameters of the Feet during Gait—Cross-Sectional Research

“…In order to capture the dynamic parameters, we used a Podoprint ® platform (Namrol Group, Barcelona, Spain), which, in a previous publication, was used to assess the intra and intersession repeatability and reliability in healthy subjects with simulated LLD [25]. A self-calibrating system, with 1600 10 × 10 mm resistive sensors and a sample rate of 100 Hz, was installed into the center of a flat 4.8 m walkway at ground level (Table 1).…”

The Biomechanical Effects of Backpack Weight on Foot Plantar Pressures Among Long-Distance Hikers: Observational study

“…The analytical parameters were obtained, statically and dynamically, using a Podoprint S4® platform (Namrol, Barcelona, Spain), tted with highsensitivity self-calibrating sensors and capable of acquiring 200 images per second 27,28 .…”

Repeatability and reliability of the Kinefis Podia plantar pressure platform.

“…Plantar pressure measurements are a useful tool for evaluating foot function and identifying patients with gait problems. [1]During human gait, the foot acts passively, cushioning impact forces and actively transferring forces generated by the muscles to propel the body [1][2][3].…”

“…Although the foot can withstand the enormous pressures generated by daily dynamic activities, there are a variety of conditions and deformities that can lead to abnormal plantar pressures [1][2][3]. These increased plantar pressures can cause the underlying skin and bone to degrade, leading to ulcers and stress fractures.…”