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Vascular inflammation and blood pressure response to acute exercise

Exaggerated blood pressure (BP) response to exercise is a strong predictor of cardiovascular disease, although the mechanisms remain unknown. The purpose was to examine the association between systemic markers of vascular inflammation and exercise blood pressure (BP) responses. Participants were 191 healthy men and women (aged 45–59 years). Blood pressure was measured at baseline and during 8 min of steady state cycling ergometry exercise (at 50 W). Markers of vascular inflammation (fibrinogen, von Willebrand factor antigen, tumour necrosis factor-α, interleukin-6 [IL-6], C-reactive protein [CRP]) were measured at baseline together with other traditional risk factors including central adiposity, smoking, alcohol, and habitual physical activity. CRP (β = 0.30, p < 0.001), IL-6 (β = 0.25, p = 0.001), and fibrinogen (β = 0.14, p = 0.04) were associated with exercise systolic BP. The association with CRP remained significant after adjustment for age, sex, resting BP, and other risk factors. Other independent predictors of exercise BP included resting BP, female gender, waist–hip ratio, lower employment grade, and low physical activity level. In summary, central adiposity and vascular inflammatory processes may underlie exaggerated BP responses to acute exercise.

Adolescent sympathetic activity and salivary C-reactive protein: The effects of parental behavior

Objective: This study utilized a novel multisystem approach to investigate the effect of observed parental behavior on the relationship between biological mechanisms associated with disease processes (i.e., autonomic physiology and immune response) among their adolescent children. Method: Thirty-three adolescents (23 males), aged 11–13, and their parents participated in a laboratory session in which adolescents provided baseline measures of autonomic (sympathetic) activity, and adolescents and 1 parent participated in a laboratory based dyadic conflict resolution interaction task. This included 3 male parent/male adolescent dyads, 20 female parent/male adolescent dyads, 3 male parent/female adolescent dyads, and 7 female parent/female adolescent dyads. Approximately 3 years later, adolescents provided a salivary measure of C-Reactive Protein (sCRP) to index inflammation. Results: Analyses revealed a positive association between sympathetic activity and sCRP, as well as a moderating role of positive parental behavior in this relationship, such that the association between sympathetic activity and sCRP was greater among adolescents whose parents displayed shorter duration of positive affect. Conclusions: Overall findings indicate parental behavior may influence the association between adolescent sympathetic activity and inflammatory processes. These findings have important implications for understanding the impact of psychosocial factors on biological mechanisms of disease. (PsycInfo Database Record (c) 2022 APA, all rights reserved)