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Related Experiment Videos

Exercise intensity: subjective regulation by perceived exertion

M A Smutok, G S Skrinar, K B Pandolf

    Archives of Physical Medicine and Rehabilitation
    |December 1, 1980
    PubMed
    Summary

    Using ratings of perceived exertion (RPE) to prescribe exercise is safe and effective for achieving target heart rates (HR) above 150bpm during running. Below these levels, RPE may lead to unreliable HR.

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    Area of Science:

    • Exercise Physiology
    • Sports Science
    • Cardiovascular Health

    Background:

    • Prescribing exercise intensity is crucial for effective training and safety.
    • Heart rate (HR) is a common metric, but perceived exertion offers an alternative subjective measure.
    • Understanding the reliability of perceived exertion for exercise prescription is essential.

    Purpose of the Study:

    • To determine if physical conditioning heart rate (HR) can be safely and effectively prescribed using ratings of perceived exertion (RPE).
    • To compare speed and HR at equivalent RPE across different treadmill trials.
    • To assess the reliability of HR during exercise prescribed by RPE.

    Main Methods:

    • 10 adult men performed treadmill exercise at various speeds (T1).

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  • Subjects then regulated their own treadmill speed based on RPE from T1 during two separate trials (T2, T3).
  • Speed and HR were compared across trials at equivalent RPE levels.

    • Main Results:

    • No significant difference in speed was found across RPE levels between trials.
    • Heart rate (HR) became progressively higher in T2 and T3 compared to T1 as speed and RPE decreased.
    • HR reliability was significant during running (p < 0.05) but not walking (p > 0.05).

    Conclusions:

    • Exercise prescription by RPE can yield safe, effective, and reliable conditioning HR above 150bpm (80% HRmax) and running speeds above 9km/hr.
    • Using RPE for exercise prescription below these thresholds may result in inaccurate and unreliable HR.
    • This method has limitations and potential risks, especially in cardiac rehabilitation where precise HR adherence is critical.