Related Experiment Video
Updated: Dec 22, 2025
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
8.4K
Inertial Sensor-Based Motion Tracking in Football with Movement Intensity Quantification.
Erik Wilmes1, Cornelis J de Ruiter1, Bram J C Bastiaansen2
1Amsterdam Movement Sciences, Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, 1081BT Amsterdam, The Netherlands.
Sensors (Basel, Switzerland)
|May 6, 2020
Summary
This study validates an easy-to-use inertial sensor system for measuring football players' lower body movement. The system accurately captures kinematics and movement intensity, enhancing physical load monitoring in practice.
Area of Science:
- Sports Science
- Biomechanics
- Wearable Technology
Background:
- Inertial sensor systems offer potential for monitoring football players' physical load.
- System validity depends on movement type and intensity.
- A simple, practical system is needed for daily use.
Purpose of the Study:
- Introduce and validate an easy-to-use inertial sensor system for lower body kinematics in football.
- Assess the system's accuracy against an optoelectronic gold standard across various movements and intensities.
- Determine the system's capability to quantify movement intensity.
Main Methods:
- An inertial sensor-based motion analysis system was developed.
- 11 football players performed six football-specific movements at low, medium, and maximal intensities.
- An optoelectronic motion analysis system served as the gold standard for validation.
Main Results:
- Good validity was observed for knee and hip flexion/extension angles (RMS differences: 5.3° ± 3.4° and 8.0° ± 3.5°).
- Significant differences in mean absolute flexion/extension angular velocities were found across movement intensities.
- The system demonstrated accuracy comparable to the gold standard.
Conclusions:
- The inertial sensor system shows potential for practical application in football.
- It can accurately measure lower body kinematics and quantify movement intensity.
- This technology may improve physical load estimations for football players during training and matches.
Related Concept Videos
01:10Relative Motion Analysis - Acceleration
727
A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
727
01:23Motion of a Projectile
2.4K
Projectile motion becomes evident when a player kicks the ball into the air. The launch angle, or the angle at which the ball is kicked, plays a crucial role in determining the trajectory of the projectile. As the ball soars through the air, influenced solely by gravity, its motion can be dissected into two independent velocity components: the horizontal and the vertical.
Horizontal motion, governed by the initial kick, maintains a constant velocity throughout the flight of the soccer ball.
Horizontal motion, governed by the initial kick, maintains a constant velocity throughout the flight of the soccer ball.
2.4K
01:22Relative Motion Analysis using Rotating Axes - Acceleration
680
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
Time differentiation is...
680
01:24Relative Motion Analysis - Velocity
625
A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
625
01:24Absolute Motion Analysis- General Plane Motion
457
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
457
01:25Relative Motion Analysis using Rotating Axes
801
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
801