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Determining The Electromyographic Fatigue Threshold Following a Single Visit Exercise Test
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Effect of Progressive Fatigue on Session RPE.

Andrea Fusco1, William Sustercich2, Keegan Edgerton2

  • 1Department of Human Sciences, Society and Health, University of Cassino and Lazio Meridionale, 03043 Cassino, Italy; Italy.

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|January 20, 2021
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Session rating of perceived exertion (sRPE) effectively tracks accumulated fatigue during intense training. This study validates sRPE as a reliable fatigue marker, offering insights comparable to physiological measures.

Keywords:
glycogenoverreachingovertrainingperformancetraining load

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Area of Science:

  • Sports Science
  • Exercise Physiology
  • Human Performance

Background:

  • Rating of perceived exertion (RPE) and session RPE (sRPE) are established metrics for gauging exercise intensity.
  • sRPE offers potential insights into accumulated training fatigue, serving as an alternative to physiological measurements like blood lactate (HLa) and heart rate (HR).

Purpose of the Study:

  • To investigate the impact of progressive fatigue on sRPE during intensified training with constant absolute intensity.
  • To determine the validity of sRPE as a marker for accumulated fatigue.

Main Methods:

  • Twelve young adults completed eight interval training sessions over two weeks.
  • Measurements included %HRmax, HLa, RPE, and sRPE per session.
  • The HLa/RPE ratio was computed as a fatigue index.

Main Results:

  • Significant differences were observed across sessions for %HRmax, HLa, RPE, HLa/RPE ratio, and sRPE (p < 0.0001).
  • A strong negative correlation (r = -0.70, p < 0.0001) was found between the HLa/RPE ratio and sRPE.
  • sRPE demonstrated sensitivity to accumulated fatigue.

Conclusions:

  • sRPE is a valid and sensitive indicator of accumulated fatigue, providing valuable information beyond just training intensity.
  • Exercise scientists can utilize sRPE to monitor fatigue during intensified training periods, especially when advanced physiological monitoring is unavailable.