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Impact of 8 weeks of repeated ischemic preconditioning on running performance

  • Joshua T. Slysz
  • Jamie F. BurrEmail author
Original Article

Abstract

Purpose

To examine if repeated exposure to IPC treatment prior to training sessions improves oxygen uptake and 1-km running performance in highly trained middle-distance runners.

Methods

Fourteen highly trained endurance runners (11 male/3 female, 19 ± 2 years, 64 ± 5 ml kg−1 min−1) completed a baseline maximal oxygen consumption (\(\dot{V}{\text{O}}_{{ 2 {\text{max}}}}\)) test and 1-km running performance test before random assignment to an IPC or control group. Both groups were prescribed identical endurance training over an 8-week varsity season; however, the IPC group performed an IPC protocol (5 min ischemia, repeated 3 times, each separated by 5 min reperfusion) before every training session. After 8 weeks of training, participants completed a follow-up \(\dot{V}{\text{O}}_{{ 2 {\text{max}}}}\) test and 1-km time trial.

Results

\(\dot{V}{\text{O}}_{{ 2 {\text{max}}}}\) did not increase from baseline in either group following the 8-week training bout (P = 0.2), and neither group varied more than the other (\(\Delta \dot{V}{\text{O}}_{{ 2 {\text{max}}}}\) = IPC 0.6 ± 2 ml kg−1 min−1; control 1.5 ± 2 ml kg−1 min−1, P = 0.6) or beyond typical measurement error. The IPC decreased 1-km time trial time by 0.4% (0.5 ± 2 s), while the control group decreased by 1% (1.5 ± 3 s), but neither change was significant compared to baseline (P = 0.2). There was also no difference in time trial improvement between IPC and control (P = 0.6). However, there was a trend towards IPC significantly improving running economy at low intensity (P = 0.057).

Conclusion

Our data suggest that over a normal 8-week season in a population of highly trained middle-distance runners there is no benefit of undergoing chronic, repeated IPC treatments before training for augmenting maximal aerobic power or 1-km performance time.

Keywords

Exercise Running IPC Occlusion Hypoxia 

Abbreviations

IPC

Ischemic preconditioning

\(\dot{V}{\text{O}}_{ 2}\)

Oxygen consumption (ml kg−1 min−1)

VE

Ventilation (L/min)

RER

Respiratory exchange ratio

LOP

Least effective occlusive pressure (mmHg)

Notes

Acknowledgements

This work was supported by the Natural Sciences and Engineering Research Council of Canada under Grant 03974; Mitacs under Grant IT05783; and the Canada Foundation for Innovation under Grant 460597.

Author contributions

JTS and JFB conceived and designed research. JTS conducted experiments, analyzed data, and wrote the manuscript. All authors read and approved the manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Human Health and Nutritional SciencesUniversity of GuelphGuelphCanada

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