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Biomechanical Analysis Methods to Assess Professional Badminton Players' Lunge Performance

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Correlation between ground reaction force and tibial acceleration in vertical jumping.

Niell G Elvin¹, Alex A Elvin, Steven P Arnoczky

¹Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, USA.

Journal of Applied Biomechanics

|December 20, 2007

Summary

Wireless accelerometers accurately measure tibial accelerations during jumps, correlating well with jump height and landing forces. This technology provides valuable biomechanical data for real-world conditions outside the lab.

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Published on: February 22, 2011

Area of Science:

Biomechanics
Sports Science
Wearable Technology

Background:

Modern electronics enable unobtrusive, wireless measurement of accelerations outside laboratory settings.
Accurate measurement of joint accelerations under unrestricted conditions is crucial for understanding real-life joint mechanics.
Correlating joint accelerations with jump height and landing force can provide significant biomechanical insights.

Purpose of the Study:

To investigate the correlation between peak vertical ground reaction forces and tibial axial accelerations during free vertical jumping.
To compare jump heights calculated from force plate data versus accelerometer measurements.
To assess the utility of unobtrusive accelerometers for determining ground reaction forces and jump height.

Main Methods:

Six male subjects performed free vertical jumps.
Peak vertical ground reaction forces were measured using a force plate.
Tibial axial accelerations were measured using wireless sensor nodes; jump heights were calculated from both methods.

Main Results:

A high coefficient of determination (0.81) was found between peak ground reaction force and peak tibial axial acceleration.
Jump height calculations from force plate and accelerometer data showed strong agreement (coefficient of determination = 0.88), differing by less than 2.5 cm.
Landing forces reached up to 8 body weights, with peak tibial accelerations up to 42 g; however, these were weakly correlated with jump height (R² = 0.12).

Conclusions:

Unobtrusive accelerometers can effectively determine ground reaction forces during jump landings.
Accelerometers provide accurate jump height measurements comparable to force plates.
While accelerometers accurately measure landing forces and jump height, peak forces and accelerations do not correlate with jump height.