Introduction:

aging is characterized by physiological changes, including increased oxidative stress (OS), which is a risk factor for the development of multiple pathologies. Physical activity in daily life (PADL) is a protective factor for health and could be associated with a decrease in oxidative stress.

Objective:

to analyze the correlation of PADL and blood biomarkers of OS in older adults.

Materials and Method:

35 older adults were included (age: 69 ± 7 years, men: 57%). PADL was objectively evaluated using the DynaPort triaxial accelerometer, which measured the time in 6 different activities: Fast walking, lying, sitting, standing, moving and slow walking, respectively. The following biomarkers from peripheral blood were measured: advanced protein oxidation products (AOPP), nitric oxide (NOx), total antioxidant potential (TRAP), sulfhydryl group (SH) and superoxide enzyme dismutase (SOD). Blood glucose level, BMI and abdominal girth also were considered. The Pearson or Spearman correlation coefficients were used respectively, with p < 0.05 and 95% CI.

Results:

SOD had a correlation with fast walking (r = 0.6) and moving time (r = 0.6). AOPP had a correlation with fast walking (r = -0.4), slow walking (r = -0.5), standing (r = -0.4), moving (r = -0.4) and the lying time (r = 0.5). BMI had a correlation with moving time (r = -0.4). Glucose had a correlation with fast walking (-r = 0.63), standing (r = -0.5), moving (r = -0.6), slow walking (r = -0.61) and lying time (r = 0.54).

Conclusions:

increased levels of physical activity in daily life are significantly associated with greater antioxidant capacity, lower oxidative stress, glucose and BMI. MÉD.UIS.2020;33(1): 13-9.

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