July 16, 2018BioMed Research InternationalOpen Access

Carotid Arterial Stiffness and Hemodynamic Responses to Acute Cycling Intervention at Different Times during 12-Week Supervised Exercise Training Period

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Why the study?

Does a 12-week supervised exercise training program improve carotid arterial stiffness and hemodynamic responses in sedentary young males?

Structured PICO

Does a 12-week supervised exercise training program improve carotid arterial stiffness and hemodynamic responses in sedentary young males?

Population

26 sedentary young males

Intervention

12-week supervised exercise training program at moderate intensity, with acute cycling interventions at weeks 0, 4, 8, and 12

Outcome

Alterations in arterial stiffness and hemodynamic responses of the right common carotid artery during resting state and immediately following acute cycling interventionsurrogate

A 12-week moderate-intensity exercise program improves resting carotid arterial stiffness and attenuates the acute hemodynamic responses to cycling in sedentary young men.

Implication

May support exercise for arterial stiffness in sedentary young men; hypothesis-generating and leaves causal effects open pending RCTs.

Abstract

This paper studied the alterations in arterial stiffness and hemodynamic responses during resting state and immediately following acute cycling intervention at different times across 12-week supervised exercise training. Twenty-six sedentary young males participated in the exercise training program at moderate intensity. Arterial stiffness and hemodynamic variables of the right common carotid artery were measured and computed during resting state and immediately following acute cycling intervention at weeks 0, 4, 8, and 12. Across the 12-week exercise training, carotid arterial stiffness was decreased at weeks 8 and 12 and hemodynamic variables were improved at week 12 during resting state. In response to acute cycling intervention, carotid arterial stiffness exhibited an acute increase foremost at 8 weeks, and arterial maximal and mean diameters showed acute decreases at weeks 0 and 4. Despite significant differences in arterial stiffness and hemodynamic variables between resting state and immediately after acute intervention for each time period, these differences presented a progressive decrease across the 12-week exercise training. In conclusion, long-term exercise training not only improved carotid arterial stiffness and hemodynamic alterations when at rest but also negated the acute responses of carotid arterial stiffness and hemodynamic variables to acute cycling intervention.