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Conduit Artery Diameter During Exercise Is Enhanced After Local, but Not Remote, Ischemic Preconditioning.
Scott Cocking1,2, N T Cable3,4, Mathew G Wilson1,2
1Athlete Health and Performance Research Centre, Aspetar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.
Frontiers in Physiology
|May 10, 2018
Summary
Local ischemic preconditioning (IPC) increased artery diameter during exercise but did not improve blood flow or vascular function post-exercise. Remote IPC showed no significant effects on exercise hemodynamics or vascular responses.
Area of Science:
- Exercise Physiology
- Cardiovascular Physiology
- Vascular Biology
Background:
- Ischemic preconditioning (IPC) may enhance exercise capacity by improving exercise-induced blood flow and vascular function.
- Understanding the localized effects of IPC on vascular responses during exercise is crucial for optimizing performance and recovery.
Purpose of the Study:
- To investigate if local IPC enhances exercise-induced blood flow and prevents decreases in vascular function post-exercise.
- To compare the effects of local IPC, remote IPC, and a sham procedure on vascular responses during submaximal handgrip exercise.
Main Methods:
- Eighteen healthy males underwent local IPC, remote IPC, or sham conditions prior to 30 minutes of submaximal handgrip exercise.
- Brachial artery diameter and blood flow were measured using ultrasonography during exercise.
- Flow-mediated dilation (FMD) assessed pre- and post-exercise vascular function.
Main Results:
- Local IPC significantly increased brachial artery diameter during exercise compared to remote IPC.
- No significant differences in exercise blood flow were observed between local IPC, remote IPC, and sham conditions.
- Post-exercise FMD, a measure of vascular function, remained similar across all conditions.
Conclusions:
- Local IPC enhances exercise-induced conduit artery dilation but does not increase exercise blood flow.
- The observed changes in artery diameter with local IPC do not translate to improved post-exercise vascular function.
- Remote IPC did not demonstrate significant effects on exercise hemodynamics or vascular function in this study.
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