Breaking-up sedentary time is associated with physical function in older adults.

Area of Science:

• Gerontology
• Kinesiology
• Public Health

Background:

• Physical function is vital for older adults' independence and daily activities.
• Sedentary behavior (SB) and physical activity levels influence physiological capacity.
• Understanding these relationships is key for promoting healthy aging.

Purpose of the Study:

• To investigate the associations between sedentary behavior (SB), breaks in sedentary time (BST), and moderate-to-vigorous physical activity (MVPA) with physical function in older adults.
• To determine the independent contributions of BST and MVPA to physical function.
• To inform strategies for preserving physical function in aging populations.

Main Methods:

• Accelerometers (ActiGraph, GT1M) measured physical activity and SB in 87 males and 128 females (65-94 years).
• Physical function was assessed using the Senior Fitness Test battery, creating a composite Z-score.
• Statistical analyses adjusted for demographic, independence, and medical status variables.

Main Results:

• Breaks in sedentary time (BST) showed a significant positive association with composite physical function.
• Moderate-to-vigorous physical activity (MVPA) was also positively associated with physical function.
• Low BST combined with less than 30 minutes/day of MVPA correlated with lower physical function.

Conclusions:

• Breaking up sedentary time is associated with enhanced physical function in older adults.
• MVPA also plays a significant role in maintaining physical function.
• Incorporating BST into guidelines may help preserve physical function and support daily living activities in older adults.