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Related Experiment Video

Updated: Jul 23, 2025

An Inertial Measurement Unit Based Method to Estimate Hip and Knee Joint Kinematics in Team Sport Athletes on the Field

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System Based on an Inertial Measurement Unit for Accurate Flight Time Determination in Vertical Jumps.

Juan A Moreno-Pérez¹, Isidoro Ruiz-García¹, Ismael Navarro-Marchal^2,3

¹ECSens, Sport and Health University Research Institute (iMUDS), Department of Electronics and Computer Technology, ETSIIT, University of Granada, 18014 Granada, Spain.

Sensors (Basel, Switzerland)

|July 14, 2023

Summary

This summary is machine-generated.

Elite athletes can now precisely monitor jumping capacity with a new, affordable accelerometer system. This portable device measures flight time and jump height, aiding performance tracking and injury prevention in sports training.

Keywords:

inertial measurement system jump monitoring smartphone app

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Area of Science:

Sports Science
Biomechanical Engineering
Wearable Technology

Background:

Elite sports demand meticulous monitoring of athlete performance.
Jumping capacity is a key indicator for performance, progression, and injury prevention.
Existing methods for measuring jump performance can be costly or lack portability.

Purpose of the Study:

To develop an affordable and portable system for measuring jump flight time and height.
To integrate the system with a smartphone application for real-time data processing and reporting.
To assess the system's precision for monitoring elite athletes.

Main Methods:

Development of a low-cost accelerometer-based circuit.
Wireless communication via Bluetooth module transmitting data over UART to an Android application.
Performance evaluation using counter-movement jumps with seven subjects.

Main Results:

The system accurately measures flight time and jump height.
Average deviation for flight time was 2.1% (~0.01 s).
Average deviation for jump height was 4.6% (~0.01 m).

Conclusions:

The developed system offers a viable, portable solution for monitoring jumping capacity in sports.
Its precision supports its use in high-level sports training sessions.
The system's affordability and 9-hour battery life enhance its practical application for athletes.