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Postconditioning with Lactate-enriched Blood for Cardioprotection in ST-segment Elevation Myocardial Infarction
Published on: May 28, 2019
Effect of ischemic preconditioning on lactate accumulation and running performance
Tom G Bailey1, Helen Jones, Warren Gregson
1Research Institute for Sport and Exercise Science, Liverpool John Moores University, Liverpool, England, United Kingdom.
Medicine and Science in Sports and Exercise
|July 31, 2012
Summary
Ischemic preconditioning (IPC) enhances running performance and reduces lactate buildup. This method may allow athletes to achieve higher work rates, improving overall exercise capacity and 5-km time trial results.
Area of Science:
- Exercise Physiology
- Sports Science
- Cardiovascular Research
Background:
- Ischemic preconditioning (IPC) is known to protect against myocardial infarction damage.
- Observational studies suggest IPC may improve exercise performance.
- The underlying physiological mechanisms for IPC's effect on exercise performance remain largely unexplored.
Purpose of the Study:
- To investigate the effect of IPC on 5-km running time trial performance.
- To examine whether IPC can reduce lactate accumulation during incremental exercise.
- To explore potential mechanisms linking IPC to improved exercise capacity.
Main Methods:
- A randomized crossover study involving 13 healthy men.
- Participants underwent either IPC (bilateral leg occlusion) or a control intervention.
- Performance was assessed via a graded maximal treadmill test and a 5-km running time trial, with blood lactate measured.
Main Results:
- IPC intervention led to a significantly lower increase in blood lactate during submaximal exercise compared to the control (1.07 ± 0.11 mmol·L lower, P = 0.023).
- The 5-km running time trial was completed 34 seconds faster following IPC (95% CI, 5-64 s; P = 0.027).
- No significant differences in submaximal gas exchange parameters were observed between conditions.
Conclusions:
- IPC significantly improves 5-km time trial performance in healthy men.
- IPC is associated with attenuated blood lactate accumulation at submaximal exercise intensities.
- These findings suggest IPC may enhance exercise performance by enabling higher work rates and improving metabolic efficiency.
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