Enhanced endothelium-dependent vasodilation in older endurance-trained men

Area of Science:

• Cardiovascular Physiology
• Exercise Science
• Aging Research

Background:

• Endothelium-dependent vasodilation (EDD) may decline with age in healthy individuals.
• Endurance exercise is known to impact cardiovascular health.
• The effects of long-term endurance training on EDD in older adults require further investigation.

Purpose of the Study:

• To investigate whether long-term endurance training can attenuate age-related decline in EDD.
• To compare EDD between master athletes and healthy sedentary older men.
• To explore the relationship between aerobic exercise capacity and EDD in older men.

Main Methods:

• Study included 10 endurance-trained older men (master athletes) and 10 healthy sedentary older men.
• Measurements included aerobic exercise capacity (VO2 max), plasma lipids, insulin, homocysteine, and brachial artery diameter via vascular ultrasound.
• Endothelium-dependent and endothelium-independent vasodilation were assessed.

Main Results:

• Master athletes exhibited significantly higher VO2 max compared to sedentary controls.
• Brachial arterial diameter during hyperemia was greater in master athletes, indicating enhanced EDD.
• Peak vasodilatory response was significantly higher in trained individuals; endothelium-independent vasodilation was similar.

Conclusions:

• Long-term endurance exercise training is associated with enhanced EDD in older men.
• Improved EDD is linked to higher aerobic exercise capacity (VO2 max).
• These benefits of endurance training on vascular function are systemic and detectable even in untrained limb arteries.