Elderly Tai Chi practitioners exhibit superior multisensory integration in a dual-task paradigm

Area of Science:

• Gerontology
• Neuroscience
• Kinesiology

Background:

• Tai Chi (TC) is a mind-body exercise known for its potential benefits on balance and cognitive function in older adults.
• Multisensory integration is crucial for maintaining postural stability, especially during complex tasks.
• Dual-tasking, which involves performing a postural task concurrently with a cognitive task, presents a significant challenge to balance control.

Purpose of the Study:

• To investigate whether elderly Tai Chi practitioners exhibit enhanced multisensory integration during dual-tasking compared to non-practitioners.
• To assess the impact of Tai Chi practice on standing stability under varying sensory conditions and cognitive loads.

Main Methods:

• A cross-sectional study comparing 26 elderly Tai Chi practitioners (TCP) with at least 5 years of experience and 28 age-matched controls (TC Naïve).
• The modified Clinical Test of Sensory Interaction on Balance (mCTSIB) was used to assess dual-task standing stability, incorporating sensory conflict.
• Center of Gravity (COG) Sway Velocity was measured to quantify standing stability during single-task and dual-task conditions (postural task: standing; cognitive task: serial subtraction).

Main Results:

• No significant differences in standing stability were observed between TCP and TC Naïve groups during single-task conditions.
• Under dual-task conditions, TCP demonstrated significantly lower COG Sway Velocity, indicating improved standing stability compared to TC Naïves.
• While TC Naïves showed significant effects of task type and balance challenge, TCP exhibited a significant interaction between task type and balance challenge, suggesting adaptive balance control.

Conclusions:

• Elderly Tai Chi practitioners possess enhanced dual-task standing stability, particularly when confronted with challenging balance conditions.
• Tai Chi practice may improve the ability to integrate sensory information and maintain balance during concurrent cognitive and postural demands.
• These findings suggest Tai Chi is a beneficial intervention for improving functional balance and multisensory integration in older adults.