Effect of aerobic training on cognitive function and arterial stiffness in sedentary young adults : a pilot randomized controlled trial

This study measured cognitive and vascular responses to aerobic training in sedentary young adults. Ten adults (6 women, 4 men; 18–29 years) were randomly assigned to an experimental or no-treatment control group. The experimental group engaged in a 6-week intervention, performed on exercise cycle and treadmill, 3x/week, 50 min/session; intensity was increased over time. Outcome measures included arterial stiffness (augmentation index, AIx, and pulse pressure), cardiorespiratory fitness (VO2MX), and cognitive function (attention, processing speed, working memory, episodic memory, and executive function). Participants randomized to aerobic training improved processing speed versus control (P=0.002, ES = 0.55). However, no group × time effects were noted in other domains of cognitive function. AIx was reduced by approximately 16% from before to after intervention in the experimental group; however, the improvement was not statistically significant versus control (P=0.20, ES = 0.22). Pulse pressure did not change between groups over time (P=0.97 ES = 0.0). VO2MX increased by approximately 10% in the experimental group; however, the change was not significant between groups over time (P=0.16, ES = 0.27). Vascular and cognitive adaptations to aerobic training may move in parallel. Robust trials simultaneously investigating a broad spectrum of aerobic training interventions and vascular and cognitive outcomes are warranted.