Correlation between Muscle Mass and Physical Activity Level in Older Adults at Risk of Falling: The FITNESS Study

Area of Science:

• Gerontology
• Sarcopenia Research
• Geriatric Medicine

Background:

• Investigating the relationship between muscle mass and physical activity in older adults prone to falls.
• Assessing objective and subjective measures of physical activity in this population.

Purpose of the Study:

• To determine the correlation between muscle mass and physical activity levels in elderly individuals who fall or are at high risk of falling.
• To identify factors associated with muscle mass in this cohort.

Main Methods:

• The FITNESS study enrolled 170 participants aged 75+ years from French university hospitals.
• Objective physical activity was measured using actimetry, and muscle mass via impedancemetry.
• Data were analyzed using correlation and multivariate analyses.

Main Results:

• Muscle mass (whole body and lower limbs) positively correlated with active energy expenditure (AEE).
• No significant correlation was found between muscle mass and daily step count or the Incidental and Planned Exercise Questionnaire (IPEQ) score.
• Multivariate analysis indicated AEE and albumin levels were associated with whole-body muscle mass, while AEE and Charlson index were linked to lower limb muscle mass.

Conclusions:

• Reduced physical activity is associated with decreased muscle mass in older adults at risk of falling.
• Combating sedentary behavior and promoting physical activity are dual priorities for fall prevention in this demographic.