Accelerometer-measured physical activity and sample-based frailty in older women: does pattern really matter?

Area of Science:

• Gerontology
• Exercise Physiology
• Public Health

Background:

• The relationship between physical activity patterns and frailty in older adults is not well understood.
• Frailty and its subdomains are significant concerns for aging populations, impacting health and independence.

Purpose of the Study:

• To investigate the correlations between different patterns of physical activity (PA) and frailty, including its subdomains.
• To identify optimal physical activity thresholds for preventing and managing frailty in community-dwelling older women.

Main Methods:

• A cross-sectional study involving 1,099 women aged 60-70 years.
• Physical activity was measured using accelerometers, distinguishing between bouted (≥10 min) and sporadic (<10 min) activity.
• Frailty was assessed using Fried's frailty phenotype, with data analyzed via logistic regression and ROC curves.

Main Results:

• Both bouted and sporadic moderate-to-vigorous physical activity (MVPA) were associated with reduced odds of prefrailty and frailty.
• Bouted light physical activity (LPA) was linked to decreased odds of prefrailty.
• MVPA, regardless of bout duration, was associated with lower odds of being slow and exhausted, while bouted LPA and MVPA were linked to lower odds of low physical activity.

Conclusions:

• Any form of MVPA, bouted or sporadic, can be recommended for physical activity programs aimed at improving and preventing frailty in older women.
• Bouted LPA is suitable for managing prefrailty.
• The benefits of MVPA on frailty appear consistent across different frailty subdomains.