Comparison of an Inertial Measurement Unit System and Baropodometric Platform for Measuring Spatiotemporal Parameters and Walking Speed in Healthy Adults

Motor Control ◽  
2021 ◽  
Vol 25 (1) ◽  
pp. 89-99
Author(s):  
Luca Correale ◽  
Vittoria Carnevale Pellino ◽  
Luca Marin ◽  
Massimiliano Febbi ◽  
Matteo Vandoni
Keyword(s):  
Inertial Measurement Unit ◽  
Stride Length ◽  
Walking Speed ◽  
Healthy Adults ◽  
Measurement Unit ◽  
Inertial Measurement ◽  
Therapy Program ◽  
Spatiotemporal Parameters ◽  
High Level ◽  
Level Of Agreement

Spatiotemporal parameters of walking are used to identify gait impairments and provide a tailored therapy program. Baropodometric platforms are not often used for measuring spatiotemporal parameters and walking speed and it is required to determine accuracy. The aim of this study was to compare FreeMed® Platform gait outcomes with a validated inertial measurement unit. There were 40 healthy adults without walking impairments enrolled. Each subject walked along a 15-m walkway at self and slow self-selected speed wearing an inertial measurement unit on the FreeMed® Platform. Stride length and time, right and left stance, swing time, and walking speed were recorded. Walking speed, stride length, and step time showed a very high level of agreement at slow walking speed and a high and moderate level of agreement at normal walking speed. FreeMed® Platform is useful to assess gait outcomes and could improve the exercise prescription.

scholarly journals Measuring Gait Velocity and Stride Length with an Ultrawide Bandwidth Local Positioning System and an Inertial Measurement Unit

Sensors ◽  
2021 ◽  
Vol 21 (9) ◽  
pp. 2896
Author(s):  
Pratham Singh ◽  
Michael Esposito ◽  
Zach Barrons ◽  
Christian A. Clermont ◽  
John Wannop ◽  
...  
Keyword(s):  
Gold Standard ◽  
Gait Speed ◽  
Inertial Measurement Unit ◽  
Stride Length ◽  
Measurement Unit ◽  
Gait Velocity ◽  
Positioning System ◽  
Inertial Measurement ◽  
Measurement Systems ◽  
Local Positioning System

One possible modality to profile gait speed and stride length includes using wearable technologies. Wearable technology using global positioning system (GPS) receivers may not be a feasible means to measure gait speed. An alternative may include a local positioning system (LPS). Considering that LPS wearables are not good at determining gait events such as heel strikes, applying sensor fusion with an inertial measurement unit (IMU) may be beneficial. Speed and stride length determined from an ultrawide bandwidth LPS equipped with an IMU were compared to video motion capture (i.e., the “gold standard”) as the criterion standard. Ninety participants performed trials at three self-selected walk, run and sprint speeds. After processing location, speed and acceleration data from the measurement systems, speed between the last five meters and stride length in the last stride of the trial were analyzed. Small biases and strong positive intraclass correlations (0.9–1.0) between the LPS and “the gold standard” were found. The significance of the study is that the LPS can be a valid method to determine speed and stride length. Variability of speed and stride length can be reduced when exploring data processing methods that can better extract speed and stride length measurements.

The Automatic Basketball Rebound System

2018 ◽  
Author(s):  
Thomas Smith ◽  
Vidya K. Nandikolla
Keyword(s):  
Inertial Measurement Unit ◽  
High Efficiency ◽  
Dead Reckoning ◽  
Measurement Unit ◽  
System Response ◽  
The Novel ◽  
Rotary Table ◽  
Inertial Measurement ◽  
Correct Orientation ◽  
High Level

In the sport of basketball, it is important to practice shooting the ball to develop the skill of making the shot in the basket at a high efficiency. Making shots at a high efficiency allows the player to succeed at a high level in the sport. The main focus of the paper describes the design and development of an automatic basketball rebound (ABR) system. The developed ABR provides a system that will launch the ball back to the player at any position on the court within a 50-foot radius. This is accomplished by a variable spring loaded launching mechanism that will compress a spring, depending on the players location, to generate the appropriate force required to launch the ball back to the player. The novel launching mechanism developed is mounted to a rotary table that ensures the launching mechanism is in the correct orientation with the player once the ball is launched. The player is outfitted with an inertial measurement unit to track their position using a method known as dead reckoning. This information is relayed back to a microcontroller that determines the system response. The ABR system is made from lightweight materials and is compact such that it is easy to move around compared to its predecessors.

Walking speed estimation using a shank-mounted inertial measurement unit

2010 ◽  
Vol 43 (8) ◽  
pp. 1640-1643 ◽  
Author(s):  
Q. Li ◽  
M. Young ◽  
V. Naing ◽  
J.M. Donelan
Keyword(s):  
Inertial Measurement Unit ◽  
Walking Speed ◽  
Measurement Unit ◽  
Speed Estimation ◽  
Inertial Measurement

scholarly journals Can IMU Provide an Accurate Vertical Jump Height Estimate?

2021 ◽  
Vol 11 (24) ◽  
pp. 12025
Author(s):  
Stefan Marković ◽  
Milivoj Dopsaj ◽  
Sašo Tomažič ◽  
Anton Kos ◽  
Aleksandar Nedeljković ◽  
...  
Keyword(s):  
Inertial Measurement Unit ◽  
Vertical Jump ◽  
Force Plate ◽  
Measurement Unit ◽  
Jump Height ◽  
Inertial Measurement ◽  
National Team ◽  
Height Estimate ◽  
Vertical Jump Height ◽  
High Level

The aim of the present study was to determine if an inertial measurement unit placed on the metatarsal part of the foot can provide valid and reliable data for an accurate estimate of vertical jump height. Thirteen female volleyball players participated in the study. All players were members of the Republic of Serbia national team. Measurement of the vertical jump height was performed for the two exemplary jumping tasks, squat jump and counter-movement jump. Vertical jump height estimation was performed using the flight time method for both devices. The presented results support a high level of concurrent validity of an inertial measurement unit in relation to a force plate for estimating vertical jump height (CMJ t = 0.897, p = 379; ICC = 0.975; SQJ t = −0.564, p = 0.578; ICC = 0.921) as well as a high level of reliability (ICC > 0.872) for inertial measurement unit results. The proposed inertial measurement unit positioning may provide an accurate vertical jump height estimate for in-field measurement of jump height as an alternative to other devices. The principal advantages include the small size of the sensor unit and possible simultaneous monitoring of multiple athletes.

scholarly journals Estimation of stride-by-stride spatial gait parameters using inertial measurement unit attached to the shank with inverted pendulum model

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yufeng Mao ◽  
Taiki Ogata ◽  
Hiroki Ora ◽  
Naoto Tanaka ◽  
Yoshihiro Miyake
Keyword(s):  
Motion Capture ◽  
Inertial Measurement Unit ◽  
Stride Length ◽  
Inverted Pendulum ◽  
Previous Method ◽  
Measurement Unit ◽  
Inertial Measurement ◽  
Inverted Pendulum Model ◽  
Gait Parameters ◽  
Pendulum Model

AbstractInertial measurement unit (IMU)-based gait analysis systems have become popular in clinical environments because of their low cost and quantitative measurement capability. When a shank is selected as the IMU mounting position, an inverted pendulum model (IPM) can accurately estimate its spatial gait parameters. However, the stride-by-stride estimation of gait parameters using one IMU on each shank and the IPMs has not been validated. This study validated a spatial gait parameter estimation method using a shank-based IMU system. Spatial parameters were estimated via the double integration of the linear acceleration transformed by the IMU orientation information. To reduce the integral drift error, an IPM, applied with a linear error model, was introduced at the mid-stance to estimate the update velocity. the gait data of 16 healthy participants that walked normally and slowly were used. The results were validated by comparison with those extracted from an optical motion-capture system; the results showed strong correlation ($$r>0.9$$ r > 0.9 ) and good agreement with the gait metrics (stride length, stride velocity, and shank vertical displacement). In addition, the biases of the stride length and stride velocity extracted using the motion capture system were smaller in the IPM than those in the previous method using the zero-velocity-update. The error variabilities of the gait metrics were smaller in the IPM than those in the previous method. These results indicated that the reconstructed shank trajectory achieved a greater accuracy and precision than that of previous methods. This was attributed to the IPM, which demonstrates that shank-based IMU systems with IPMs can accurately reflect many spatial gait parameters including stride velocity.

scholarly journals Walking-speed estimation using a single inertial measurement unit for the older adults

PLoS ONE ◽  
2019 ◽  
Vol 14 (12) ◽  
pp. e0227075
Author(s):  
Seonjeong Byun ◽  
Hyang Jun Lee ◽  
Ji Won Han ◽  
Jun Sung Kim ◽  
Euna Choi ◽  
...  
Keyword(s):  
Older Adults ◽  
Inertial Measurement Unit ◽  
Walking Speed ◽  
Measurement Unit ◽  
Speed Estimation ◽  
Inertial Measurement
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