Related Experiment Video
Updated: Feb 13, 2026
06:52
An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field
Published on: May 26, 2020
8.7K
Inertial Measurement Units for Clinical Movement Analysis: Reliability and Concurrent Validity
Mohammad Al-Amri1,2, Kevin Nicholas3,4,5, Kate Button6,7,8
1School of Healthcare Sciences, College of Biomedical and Life Sciences, Cardiff University, Cardiff CF24 0AB, Wales, UK. Al-AmriM@cardiff.ac.uk.
Sensors (Basel, Switzerland)
|March 3, 2018
Summary
The Xsens MVN BIOMECH inertial-sensor system shows good reliability and validity for measuring lower-limb joint angles during functional activities like walking, squatting, and jumping. This makes it suitable for clinical use.
Area of Science:
- Biomechanics
- Clinical Movement Science
- Wearable Technology
Background:
- Inertial sensor-based motion capture systems offer potential for clinical movement analysis.
- Validation is crucial to ensure accuracy in clinical settings.
Purpose of the Study:
- To assess the reliability and concurrent validity of the Xsens MVN BIOMECH system.
- To evaluate its performance during clinically relevant functional activities.
Main Methods:
- 26 healthy participants were assessed by two raters over two sessions.
- Xsens MVN BIOMECH and camera-based systems were used for walking, squatting, and jumping.
- Intraclass correlation coefficient and coefficient of multiple correlation were used for analysis.
Main Results:
- Good day-to-day reliability for hip, knee, and ankle joint angles across tasks.
- Fair-to-excellent within-day reliability for walking and squatting; variable for jumping.
- Excellent sagittal plane validity and acceptable frontal/transverse plane validity for key joint angles.
Conclusions:
- The Xsens MVN BIOMECH system demonstrates sufficient reliability and validity for clinical quantification of lower-limb joint angles.
- Clinicians can utilize this system for assessing movement in activities like walking, squatting, and jumping.
Related Concept Videos
01:29Reliability and Validity
14.1K
Reliability and validity are two important considerations that must be made with any type of data collection. Reliability refers to the ability to consistently produce a given result. In the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways.
14.1K
03:38Measurement: Standard Units
82.3K
Every measurement provides three kinds of information: the size or magnitude of the measurement (a number), a standard of comparison for the measurement (a unit), and an indication of the uncertainty of the measurement. While the number and unit are explicitly represented when a quantity is written, the uncertainty is an aspect of the errors in the measurement results.
82.3K
03:02Measurement: Derived Units
56.1K
The International System of Units or SI system, by international agreement, has fixed measurement units for seven fundamental properties: length, mass, time, temperature, electric current, amount of substance, and luminosity. These are called the SI base units.
56.1K
01:27Units of Measurement
5.3K
Mechanical engineering is one of the oldest branches of engineering. It deals with designing, analyzing, and manufacturing machines and mechanical systems. To ensure precise and accurate calculations, units of measurement are used. They provide a standard system for expressing and comparing physical quantities.
There are various well-known historical measurement systems, such as the Babylonian system, the Roman system, the Egyptian system, the Olympian system, the British system, and the Indus...
There are various well-known historical measurement systems, such as the Babylonian system, the Roman system, the Egyptian system, the Olympian system, the British system, and the Indus...
5.3K
01:10Units and Standards of Measurement
45.8K
A physical quantity is defined either by specifying its measurement method or by stating how it is calculated from other measurements. For example, consider a metallic cube. We might define its mass and dimensions by specifying methods for measuring them, such as using a weighing machine and a meter scale. Then, we could define the volume by stating that it is the cube of its side, and we could calculate the density as the mass divided by the volume.
Measurements of physical quantities are...
Measurements of physical quantities are...
45.8K
01:03Inertial Frames of Reference
8.9K
Newton’s first law is usually considered to be a statement about reference frames. It provides a method for identifying a special type of reference frame: the inertial reference frame. In principle, we can make the net force on a body zero. If its velocity relative to a given frame is constant, then that frame is said to be inertial. So, by definition, an inertial reference frame is a reference frame where Newton's first law holds valid. Newton's first law applies to objects with...
8.9K