Acute vascular function responses predict chronic vascular function changes to heating and exercise interventions in...

Area of Science:

• Vascular Physiology
• Exercise Physiology
• Cardiovascular Health

Background:

• Acute stimulus response designs are common in vascular physiology for assessing health interventions due to feasibility and control.
• The relationship between acute and chronic vascular responses to stimuli remains unclear, limiting the predictive power of short-term assessments.
• Understanding this relationship is crucial for optimizing intervention strategies and predicting long-term vascular health outcomes.

Purpose of the Study:

• To determine if acute arterial function responses to blood flow interventions predict chronic changes after an 8-week intervention.
• To investigate the association between acute functional vascular responses and chronic structural artery changes.

Main Methods:

• Secondary analysis of a randomized controlled trial involving 45 healthy adults undergoing heat therapy, exercise, or combined interventions.
• Assessment of endothelial function using brachial artery (BA) flow-mediated dilation (FMD).
• Measurement of arterial stiffness via central and peripheral pulse wave velocity (cfPWV and ffPWV) and BA diameter.

Main Results:

• Acute responses in absolute and relative BA FMD and ffPWV were significantly associated with chronic responses in the same indices.
• No significant relationship was found between the acute BA FMD response and chronic changes in BA diameter.
• Acute vascular responses demonstrated predictive capability for chronic changes in endothelial function and arterial stiffness.

Conclusions:

• Acute brachial artery FMD and peripheral pulse wave velocity responses can predict chronic changes in these vascular measures.
• These findings suggest that acute vascular assessments may serve as a valuable tool for individualizing the efficacy of health interventions.
• Positive associations between acute responses and chronic changes highlight the potential for predicting intervention utility for vascular health.