Monitoring Age-Related Changes in Gait Complexity in the Wild with a Smartphone Accelerometer System.

Stride-to-stride fluctuations during walking reflect age-related changes in gait adaptability and are estimated with nonlinear measures that confine data collection to controlled settings. Smartphones, with their embedded accelerometers, may provide accessible gait analysis throughout the day. This study investigated age-related differences in linear and nonlinear gait measures estimated from a smartphone accelerometer (SPAcc) in an unconstrained, free-living environment.

Non-surgical reduction in thoracolumbar kyphosis and sagittal vertical axis corresponding with improved sensorimotor control in an older adult with spinal deformity: a Chiropractic Biophysics case report.

[Purpose] We document the significant improvement in posturography and spinal deformity by Chiropractic BioPhysics (CBP) technique methods. [Participant and Methods] A 78-year-old male presented with 20 years of chronic hip and lower back pain and stiffness. The pain was 5/10 and disability was 38%.

Validation of Linear and Nonlinear Gait Variability Measures Derived From a Smartphone System Compared to a Gold-Standard Footswitch System During Overground Walking.

Smartphones, with embedded accelerometers, may be a viable method to monitor gait variability in the free-living environment. However, measurements estimated using smartphones must first be compared to known quantities to ensure validity. This study assessed the validity and reliability of smartphone-derived gait measures compared to a gold-standard footswitch system during overground walking.

Gait variability, fractal dynamics, and statistical regularity of treadmill and overground walking recorded with a smartphone.

Background: The nonlinear variability present during steady-state gait may provide a signature of health and showcase one's walking adaptability. Although treadmills can capture vast amounts of walking data required for estimating variability within a small space, gait patterns may be misrepresented compared to an overground setting. Smartphones may provide a low-cost and user-friendly estimate of gait patterns among a variety of walking settings.

Neuromuscular organization during balance-correcting responses induced with platform-translation and upper body cable-pull perturbation methods.

Balance-correcting responses are fast, accurate, and functionally- and directionally-specific. However, there remains a lack of clarity in the literature as to how balance-correcting responses are organized, perhaps due to use of various perturbation methods. This study investigated the differences in neuromuscular organization of balance-correcting responses induced with platform-translation (PLAT) and upper body cable-pull (PULL) methods.