A study on the reliability of measuring dynamic balance ability using a smartphone.

Area of Science:

• Biomechanics
• Human Movement Science
• Wearable Technology

Background:

• Dynamic balance is crucial for daily activities and injury prevention.
• Objective measurement of dynamic balance is essential for clinical and research settings.
• Traditional balance assessment tools can be expensive and less accessible.

Purpose of the Study:

• To evaluate the reliability of smartphones as measuring equipment for dynamic balance ability.
• To assess the test-retest reliability of smartphone-based balance measurements.
• To determine the potential of using smartphones as a cost-effective balance assessment tool.

Main Methods:

• Thirty healthy young adults participated in the study.
• Balance was measured using a smartphone's sensors (accelerometer and gyroscope) while subjects stood on a Biodex Balance System.
• Measurements were repeated at a one-day interval to assess test-retest reliability.

Main Results:

• High interclass correlation coefficients (ICC) were observed for acceleration measurements with open eyes (0.8) and closed eyes (0.9).
• Gyroscope measurements showed moderate to good reliability with open eyes (ICC=0.7) and fair reliability with closed eyes (ICC=0.6).
• Smartphone-based measurements demonstrated consistent results over a one-day interval.

Conclusions:

• Smartphones possess sufficient potential to serve as reliable measuring equipment for dynamic balance ability.
• The findings support the use of smartphones as an accessible and potentially valid tool for balance assessment.
• Further research is warranted to explore smartphone-based dynamic balance assessment in diverse populations and clinical conditions.