Abstract
Purpose
There is some evidence that measures of acute post-exercise recovery are sensitive to the homeostatic stress of the preceding exercise and these measurements warrant further investigation as possible markers of training load. The current study investigated which of four different measures of metabolic and autonomic recovery was most sensitive to changes in exercise intensity.
Methods
Thirty-eight moderately trained runners completed 20-min bouts of treadmill exercise at 60, 70 and 80 % of maximal oxygen uptake (VO2max) and four different recovery measurements were determined: the magnitude of excess post-exercise oxygen consumption (EPOCMAG), the time constant of the oxygen consumption recovery curve (EPOCτ), heart rate recovery within 1 min (HRR60s) and the time constant of the heart rate recovery curve (HRRτ) .
Results
Despite significant differences in exercise parameters at each exercise intensity, only EPOCMAG showed significantly slower recovery with each increase in exercise intensity at the group level and in the majority of individuals. EPOCτ was significantly slower at 70 and 80 % of VO2max vs. 60 % VO2max and HRRτ was only significantly slower when comparing the 80 vs. 60 % VO2max exercise bouts. In contrast, HRR60s reflected faster recovery at 70 and 80 % of VO2max than at 60 % VO2max.
Conclusion
Of the four recovery measurements investigated, EPOCMAG was the most sensitive to changes in exercise intensity and shows potential to reflect changes in the homeostatic stress of exercise at the group and individual level. Determining EPOCMAG may help to interpret the homeostatic stress of laboratory-based research trials or training sessions.
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Abbreviations
- CVTEM :
-
Typical error as a coefficient of variation
- EE:
-
Energy expenditure
- EPOC:
-
Excess post-exercise oxygen consumption
- EPOCMAG :
-
Magnitude of excess post-exercise oxygen consumption
- EPOCτ:
-
Time constant of oxygen consumption recovery curve
- HR:
-
Heart rate
- HRR:
-
Heart rate recovery
- HRR60s :
-
1-min heart rate recovery
- HRRτ:
-
Time constant of the heart rate recovery curve
- HRmax :
-
Maximal heart rate
- RER:
-
Respiratory exchange ratio
- RPE:
-
Rating of perceived exertion
- PTRS:
-
Peak treadmill running speed
- VO2 :
-
Oxygen uptake
- VO2max :
-
Maximum oxygen uptake
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Acknowledgments
This research was supported financially by the Deutscher Akademischer Austausch Dienst (DAAD), the Ernst and Ethel Eriksen Trust and the University of Cape Town.
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The authors declare that there was no conflict of interest in the preparation of this review.
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Communicated by Massimo Pagani.
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Mann, T.N., Webster, C., Lamberts, R.P. et al. Effect of exercise intensity on post-exercise oxygen consumption and heart rate recovery. Eur J Appl Physiol 114, 1809–1820 (2014). https://doi.org/10.1007/s00421-014-2907-9
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DOI: https://doi.org/10.1007/s00421-014-2907-9