Wearable sensors for gait analysis

Agostini, Valentina; Knaflitz, Marco; Antenucci, L.; Lisco, Giulia; Gastaldi, Laura; Tadano, Shigeru

doi:10.1109/memea.2015.7145189

Cited by 26 publications

(17 citation statements)

References 20 publications

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“…Measurements of the lower limbs allow for calculating the body segment coordinate system [ 36 ]. Ten reflective markers were placed in correspondence of the volunteer’s greater trochanter, lateral epicondyle of the femur, medial epicondyle of the femur, lateral malleolus and medial malleolus, bilaterally [ 30 ]. The volunteer was placed in front of a homogeneous background.…”

Section: Methodsmentioning

confidence: 99%

“…Ten reflective markers were placed in correspondence of the volunteer’s greater trochanter, lateral epicondyle of the femur, medial epicondyle of the femur, lateral malleolus and medial malleolus, bilaterally [ 30 ].…”

Section: Methodsmentioning

confidence: 99%

“…In particular, footswitches were positioned beneath the back portion of the heel, the first, and fifth metatarsal heads [ 38 ]. Six STEP32 electro-goniometric sensors were fixed in correspondence of ankle, knee and hip joints of each lower limb, with bi-adhesive tape [ 30 ]. Elastic bands with Velcro and tape were used to fix the seven H-Gait inertial sensors: two below the medial malleolus [ 37 ], two on the shanks in correspondence of the anterior side of the tibia bone, two on the lateral side of the thighs and one on the pelvis, in the posterior center point between the left and right iliac crest.…”

Section: Methodsmentioning

confidence: 99%

“…In a pilot study [ 30 ], the gait parameters obtained with H-Gait were compared to those obtained with a STEP32 (Medical Technology, Torino, Italy) device, a commercial wearable system for gait analysis, used as a reference system. STEP32 directly measures gait data: gait events are detected by foot-switches, while joint angles are measured, in the sagittal plane, by electrogoniometers.…”

Section: Introductionmentioning

confidence: 99%

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A Wearable Magneto-Inertial System for Gait Analysis (H-Gait): Validation on Normal Weight and Overweight/Obese Young Healthy Adults

Agostini

Gastaldi

Rosso

et al. 2017

Sensors

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Background: Wearable magneto-inertial sensors are being increasingly used to obtain human motion measurements out of the lab, although their performance in applications requiring high accuracy, such as gait analysis, are still a subject of debate. The aim of this work was to validate a gait analysis system (H-Gait) based on magneto-inertial sensors, both in normal weight (NW) and overweight/obese (OW) subjects. The validation is performed against a reference multichannel recording system (STEP32), providing direct measurements of gait timings (through foot-switches) and joint angles in the sagittal plane (through electrogoniometers). Methods: Twenty-two young male subjects were recruited for the study (12 NW, 10 OW). After positioning body-fixed sensors of both systems, each subject was asked to walk, at a self-selected speed, over a 14-m straight path for 12 trials. Gait signals were recorded, at the same time, with the two systems. Spatio-temporal parameters, ankle, knee, and hip joint kinematics were extracted analyzing an average of 89 ± 13 gait cycles from each lower limb. Intraclass correlation coefficient and Bland-Altmann plots were used to compare H-Gait and STEP32 measurements. Changes in gait parameters and joint kinematics of OW with respect NW were also evaluated. Results: The two systems were highly consistent for cadence, while a lower agreement was found for the other spatio-temporal parameters. Ankle and knee joint kinematics is overall comparable. Joint ROMs values were slightly lower for H-Gait with respect to STEP32 for the ankle (by 1.9° for NW, and 1.6° for OW) and for the knee (by 4.1° for NW, and 1.8° for OW). More evident differences were found for hip joint, with ROMs values higher for H-Gait (by 6.8° for NW, and 9.5° for OW). NW and OW showed significant differences considering STEP32 (p = 0.0004), but not H-Gait (p = 0.06). In particular, overweight/obese subjects showed a higher cadence (55.0 vs. 52.3 strides/min) and a lower hip ROM (23.0° vs. 27.3°) than normal weight subjects. Conclusions: The two systems can be considered interchangeable for what concerns joint kinematics, except for the hip, where discrepancies were evidenced. Differences between normal and overweight/obese subjects were statistically significant using STEP32. The same tendency was observed using H-Gait.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Wearable Magneto-Inertial System for Gait Analysis (H-Gait): Validation on Normal Weight and Overweight/Obese Young Healthy Adults

Agostini

Gastaldi

Rosso

et al. 2017

Sensors

View full text Add to dashboard Cite

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“…MIMUs usually consist of three-axis accelerometers, gyroscopes, and magnetic sensors, measuring the sum of gravitational and linear accelerations, angular velocities, and local magnetic field vector components, with respect to a Cartesian reference system fixed with the MIMU. Orientation and position in 3D space can be calculated by sensor fusion algorithms [10], [11]. The algorithm most used implements the extended Kalman filter [12].…”

Section: Introductionmentioning

confidence: 99%

Gait measurements in the transverse plane using a wearable system: An experimental study of test-retest reliability

Rosso

Gastaldi

Agostini

et al. 2017

2017 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

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3D gait analysis comprises the study of kinematics in the sagittal, coronal, and transverse planes. The transverse plane measurements are usually less used and generally show the lowest reliability. Nevertheless, the knee and ankle joint center trajectories, in the transverse plane, provide new parameters that may be important in clinical gait analysis. The aim of this study is to analyze the test-retest variability of these parameters. Gait measurements were performed using H-Gait, a wearable system based on magnetic and inertial sensors. A normal weight and an overweight subject were recruited and were asked to walk at their preferred speed for 6 trials. For both of them, the angle between the right and left knee and ankle joint center trajectories were analyzed. Overall, results showed a standard deviation across trials always lower than 2°. This small standard deviation was found also in the overweight subject, for whom it is usually challenging to obtain reliable gait measurements. In addition, a greater knee angle between the right and left joint center trajectories was found in the overweight subject compared to the normal weight. The promising results of this study suggest that the new parameters introduced might be suitable to assess gait of subjects with different anthropometric characteristics.

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