NONAN GaitPrint: An IMU gait database of healthy young adults

Abstract

An ongoing thrust of research focused on human gait pertains to identifying individuals based on gait patterns. However, no existing gait database supports modeling efforts to assess gait patterns unique to individuals. Hence, we introduce the Nonlinear Analysis Core (NONAN) GaitPrint database containing whole body kinematics and foot placement during self-paced overground walking on a 200-meter looping indoor track. Noraxon Ultium MotionTM inertial measurement unit (IMU) sensors sampled the motion of 35 healthy young adults (19–35 years old; 18 men and 17 women; mean ± 1 s.d. age: 24.6 ± 2.7 years; height: 1.73 ± 0.78 m; body mass: 72.44 ± 15.04 kg) over 18 4-min trials across two days. Continuous variables include acceleration, velocity, position, and the acceleration, velocity, position, orientation, and rotational velocity of each corresponding body segment, and the angle of each respective joint. The discrete variables include an exhaustive set of gait parameters derived from the spatiotemporal dynamics of foot placement. We technically validate our data using continuous relative phase, Lyapunov exponent, and Hurst exponent—nonlinear metrics quantifying different aspects of healthy human gait.

Pattern analysis using lower body human walking data to identify the gaitprint

“…Twenty-six young adults between the ages 19–35 (12 female, 24.5 ± 2.1 years old, 174.5 ± 7.0 cm tall, weighing 72.3 ± 15.6 kg), 28 middle-aged adults between the ages 36–55 (24 female, 46.4 ± 6.1 years old, 170.5 ± 7.4 cm tall, weighing 80.9 ± 14.6 kg), and 27 older adults greater than 55 years old (12 female, 64.3 ± 6.2 years old, 172.2 ± 9.3 cm tall, weighing 80.6 ± 15.9 kg) were sampled from the NONAN GaitPrint dataset [45] . Each participant came into the lab twice, spread one week apart, to complete 9 walking trials per session.…”

“…All participant data, including height, weight, anthropometrics, trial details, as well as kinematic features, can be found in the supplementary material . Kinematic time series for the young adults are also published elsewhere, and the data from the middle and older adults soon to follow [45] .

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