Advanced Glycation End-products are associated with Physical Activity and Physical Functioning in the older population

Background:
Decline in physical activity and functioning is commonly observed in the older population and might be associated with biomarkers such as Advanced Glycation End-products (AGEs). AGEs contribute to age-related decline in the function of cells and tissues in normal aging and have been found to be associated with motor function decline. The aim of this study is to investigate the association between the levels of AGEs, as assessed by skin autofluorescence, and the amount of physical activity and loss of physical functioning in older participants.

Methods:
Cross-sectional data of 5,624 participants aged 65 years and older from the Lifelines cohort study was used. Linear regression analyses were utilized to study associations between skin autofluorescence/AGE-levels (AGE reader), the number of physically active days (SQUASH), and physical functioning (RAND-36), respectively. A logistic regression analysis was used to study associations between AGE-levels and the compliance with the Dutch physical activity guidelines (SQUASH).

Results:
A statistical significant association between AGE levels and the number of physically active days (β = -0.21, 95% CI: -0.35 to -0.07, P = .004), physical functioning (β = -1.60, 95% CI: -2.64 to -0.54, P = .003), and compliance with the Dutch physical activity guidelines (OR = 0.76, 95% CI: 0.62 to 0.94, P = .010) was revealed.

Conclusions:
This study indicates that high AGE levels may be a contributing factor as well as a biomarker for lower levels of physical activity and functioning in the older population.