The Impact of Body Composition on Physical Function Performance in Middle-aged Women
Research in older adults suggests that percent body fat may be strongly associated with physical function performance, causing increased risk for disability and loss of independence; however, the component of body composition that is most strongly associated with physical function in middle-aged females is incompletely characterized. This cross-sectional study examined the impact of lean mass and percent fat on physical function performance in middle-aged females. Eighty females (ages 52.58 ± 6.10 years) were assessed for body composition (lean mass, percent fat) via dual-energy x-ray absorptiometry, physical activity, and sedentary time via Accelerometer (steps per day, minutes per day), and physical function via Timed Up-And-Go, 30-Second Chair Stand, Transfer Task, Six-Minute Walk and Lift and Carry. Lean mass (total mass, lean mass index) was not related to any measure of physical function (all p > 0.05), while percent fat was significantly related to Transfer Task, 30-Second Chair Stand, and Six-Minute Walk performance (all p ≤ 0.05). Hierarchical linear regression analyses revealed: (1) age, steps per day, and percent fat were related to Transfer Task, 30-Second Chair Stand, and Six-Minute Walk performance (all p ≤ 0.05); (2) age, sedentary minutes per day, and percent fat were related to Timed Up-And-Go; (3) age, and average steps per day, but not percent fat, were associated with Lift and Carry performance (p > 0.05). In middle-aged women, percent fat was most strongly associated with physical function performance, suggesting that modifying percent fat via intervention may be a method for improving functional performance in middle-aged women.^
"The Impact of Body Composition on Physical Function Performance in Middle-aged Women"
Dissertations and Master's Theses (Campus Access).