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Author Spotlight: Exploring the Impact of Reduced Resistance Exercise Volume on Metabolic Health
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Perceived exertion responses to changing resistance training programming variables.

Daniel J Hiscock1, Brian Dawson, Peter Peeling

  • 1School of Sports Science, Exercise and Health, The University of Western Australia, Perth, Australia.

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|December 2, 2014
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Summary
This summary is machine-generated.

Resistance training intensity influences session rating of perceived exertion (sRPE), but not when training to maximum repetitions (MNR). Work rate was the primary factor correlating with sRPE, indicating its importance in perceived effort during exercise.

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Area of Science:

  • Exercise Physiology
  • Sports Science
  • Biomechanics

Background:

  • Session rating of perceived exertion (sRPE) is a key metric for monitoring training load in resistance exercise.
  • Understanding the factors influencing sRPE is crucial for optimizing training prescription and preventing overtraining.
  • Previous research has explored various exercise variables, but their combined impact on sRPE requires further clarification.

Purpose of the Study:

  • To investigate the influence of intensity, tonnage, fatigue rate, work rate, rest interval, time under load, and session duration on sRPE.
  • To compare sRPE across different resistance training protocols, including varying intensity and repetition schemes (fixed vs. maximum repetitions).
  • To identify the primary drivers of perceived exertion during a standardized resistance training session.

Main Methods:

  • Participants completed six standardized resistance training protocols involving five exercises at different intensities (40% and 70% of 1 repetition maximum [1RM]) and repetition schemes (fixed repetitions vs. maximum number of repetitions [MNR]).
  • Key variables measured included intensity, tonnage, fatigue rate, work rate, rest interval, time under load, and session duration.
  • Session rating of perceived exertion (sRPE) was recorded using Borg's CR-10 scale immediately post-session and at 15 and 30 minutes post-exercise.

Main Results:

  • Session rating of perceived exertion (sRPE) was significantly higher at 70% 1RM compared to 40% 1RM when tonnage was matched.
  • Protocols involving maximum number of repetitions (MNR) did not yield significant differences in sRPE, irrespective of intensity or rest duration.
  • Work rate (total tonnage per unit of time) was the sole variable significantly correlated with sRPE (r = 0.45).
  • Post-exercise sRPE did not differ significantly between 15-minute and 30-minute measurements.

Conclusions:

  • In resistance training, increasing intensity elevates sRPE when tonnage and rest duration are controlled.
  • When training to volitional failure (MNR), sRPE appears consistent regardless of the initial intensity or rest interval between sets.
  • Work rate is a critical determinant of perceived exertion during resistance exercise sessions.