Sensor-Integrated Chairs for Lower Body Strength and Endurance Assessment

Area of Science:

• Gerontology
• Biomedical Engineering
• Rehabilitation Science

Background:

• The Fullerton Functional Test Battery assesses physical fitness in older adults.
• Chair Stand Tests, including the Five Times Sit-to-Stand Test (5xSST) and 30 Second Sit-to-Stand Test (30CST), are standard for measuring lower-body strength.
• Manual administration of these tests is labor-intensive and prone to errors.

Purpose of the Study:

• To describe an automated method and device for conducting Chair Stand Tests.
• To enhance the accuracy and efficiency of lower-body strength assessment in older adults.
• To provide a reliable method for tracking lower-body strength progression.

Main Methods:

• Development of a sensor-integrated chair to automatically capture dynamic weight and distribution.
• Automatic upload of time-series weight-sensor data.
• Immediate determination of sit-to-stand timing and counts.

Main Results:

• The automated system provides immediate data for sit-to-stand timing and counts.
• Manual and sensor-collected 30CST data showed good agreement in 10 patients (M = 0.5, SD = 1.58).
• Potential for significant labor savings for medical personnel and more accurate data collection.

Conclusions:

• Automated Chair Stand Tests offer a more accurate and efficient alternative to manual methods.
• The sensor-integrated chair facilitates objective measurement of lower-body strength progression.
• Future data processing may enable measurements of fatigue, balance, and standing attempt failure mechanisms.