Dynapenic obesity and lower extremity function in elderly adults

Area of Science:

• Gerontology
• Obesity Research
• Physical Function Studies

Background:

• The interplay between dynapenia (age-related muscle weakness) and obesity, termed dynapenic obesity, is increasingly recognized but understudied in Asian elderly populations.
• Understanding its impact on physical function is crucial for developing targeted interventions in this demographic.

Purpose of the Study:

• To investigate the association between dynapenic obesity and lower extremity physical function in Chinese elderly adults.
• To compare physical function across four groups: nondynapenia/nonobesity, dynapenia-alone, obesity-alone, and dynapenic obesity.

Main Methods:

• A cross-sectional study involving 616 Chinese elderly adults.
• Participants were categorized into four groups based on the WHO Asian Criteria for Obesity and handgrip strength tertiles.
• Lower extremity function was assessed using a 20-meter gait speed test, a balance test, and a self-reported mobility disability questionnaire.

Main Results:

• Dynapenic obesity was significantly associated with a higher risk of slow gait speed and mobility disability in both men and women compared to the other groups.
• Individuals in the dynapenic obesity group showed increased odds of slow gait speed and mobility disability compared to those with dynapenia-alone or obesity-alone.
• No significant differences in balance test scores were found among the four groups for either sex.

Conclusions:

• Dynapenic obesity presents a greater risk for impaired physical function, specifically slow gait speed and mobility disability, in older Chinese adults.
• These findings underscore the distinct and combined detrimental effects of dynapenia and obesity on mobility in this population.
• Interventions targeting both muscle strength and weight management may be beneficial for improving physical function in older adults with dynapenic obesity.