Joint position sense - There׳s an app for that.

Area of Science:

• Biomechanics
• Rehabilitation Technology
• Human Movement Science

Background:

• Traditional proprioception assessment relies on passive models and expensive lab equipment.
• Active movement protocols are more functional but still require specialized facilities.
• Lack of portable, affordable instruments limits proprioception assessment outside clinical settings.

Purpose of the Study:

• To demonstrate the validity and feasibility of using a mobile device (iPod Touch) for joint position assessment.
• To establish a cost-effective and accessible method for measuring proprioception.
• To enable motion-based parameter evaluation in both laboratory and field settings.

Main Methods:

• Concurrent validity study conducted in a laboratory setting (n=9).
• Field-based study conducted at a scientific meeting (n=79).
• Comparison of mobile device joint position assessment with a magnetic tracking device.

Main Results:

• Demonstrated good agreement between the mobile device and the established magnetic tracking protocol.
• Observed decreasing angular errors with increasing shoulder flexion angles.
• Confirmed the validity and feasibility of mobile device use for motion-based parameters.

Conclusions:

• Mobile devices offer a valid and feasible tool for assessing joint position and proprioception.
• This approach significantly enhances accessibility for motion-based assessments.
• Future applications include widespread use in clinical and field-based evaluations of human movement.