Related Experiment Video
Updated: Oct 22, 2025

Biomechanical Analysis Methods to Assess Professional Badminton Players' Lunge Performance
Published on: June 11, 2019
Performance Analysis in Ski Jumping with a Differential Global Navigation Satellite System and Video-Based Pose
Ola Elfmark1,2, Gertjan Ettema3, Daniel Groos3
1Department of Civil and Environmental Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
Sensor fusion combining differential Global Navigation Satellite System (dGNSS) and markerless pose estimation (PosEst) accurately measures ski jumping performance. This combined approach offers valuable insights for research and practical applications in the sport.
Area of Science:
- Sports Science
- Biomechanics
- Sensor Technology
Background:
- Ski jumping performance relies on complex kinematic and kinetic factors.
- Accurate measurement of these factors is crucial for athlete development and research.
- Existing methods may have limitations in capturing the full scope of performance dynamics.
Purpose of the Study:
- To evaluate the agreement between differential Global Navigation Satellite System (dGNSS) and markerless pose estimation (PosEst) in ski jumping.
- To demonstrate the utility of sensor fusion for analyzing ski jumping performance.
- To explore the application of combined sensor data in research and practice.
Main Methods:
- Sensor fusion of dGNSS and PosEst systems.
- Kinematic and kinetic data collection from in-run to landing.
- Agreement assessment using 16 jumps from national-level athletes.
- Case study analysis of two ski jumps using the fused system.
Main Results:
- Good agreement between dGNSS and PosEst was found from 5m post-takeoff, within dGNSS uncertainty (±0.05m).
- The sensor fusion successfully tracked key kinematic and kinetic characteristics.
- The combined system demonstrated suitability for detailed performance analysis.
Conclusions:
- Sensor fusion of dGNSS and PosEst is a viable method for ski jumping analysis.
- The approach provides accurate and comprehensive data for understanding performance.
- This technology holds significant potential for both scientific research and practical coaching.
Related Concept Videos
Relative Motion Analysis using Rotating Axes-Problem Solving
Here, in order to determine the magnitude of velocity and acceleration for point...
Relative Motion Analysis using Rotating Axes
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...
Absolute Motion Analysis- 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...
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device
Relative Motion Analysis - Acceleration
Relative Motion Analysis using Rotating Axes - Acceleration
Time differentiation is...

