The Effect of Aerobic Exercises on Arterial Stiffness in Older People: A Systematic Review and Meta-Analysis.

Abstract

Aerobic exercise is a cost-effective intervention to improve arterial stiffness, but its effects on older people are unclear; this review aims to determine those effects. Five databases were searched for randomized controlled trials of aerobic exercises. Backward and forward citations and clinical trial registries were also reviewed. Data were extracted and synthesized. A random-effects model was used in a meta-analysis. The risk of bias and the certainty of the evidence were also assessed. The protocol of this review was registered (PROSPERO registration number: CRD42022349494). Eighteen studies (n = 775) were identified. Aerobic exercises included cycling, walking, swimming, standing core exercise, bench step exercise, aquarobic exercise, jogging, running, upper-limb cycling, and aquatic walking. Postintervention, improvements were seen in the pulse wave velocity (SMD9 = -0.89, 95% confidence interval (CI)-1.57 to -0.22), arterial velocity-pulse index (MD2 = -6.84, 95% CI -9.05 to -4.63), and arterial pressure-volume index (MD2 = -4.97, 95% CI -6.9 to -3.04), but not in the augmentation index, arterial compliance, or beta stiffness index. Exercise lasting >8 weeks but not 4-8 weeks significantly improved pulse wave velocity. Aerobic exercise had a beneficial effect on healthy older people but not on older people with disease. The overall risk of bias was high in 9 of the included studies, with some concerns in the remaining studies. The certainty of the evidence was very low. Aerobic exercises, particularly those lasting >8 weeks, appear to be effective at improving pulse wave velocity in older people postintervention. Future trials with robust designs are needed.