RPE (Rating of Perceived Exertion) is one of the most accessible...
Jo Clubb@JoClubbSportSci
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Sep 13, 2025
~1 min read
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RPE (Rating of Perceived Exertion) is one of the most accessible tools in sports science. But despite its simplicity, RPE is often misunderstood or misused in practice. Let’s dive in 👇
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RPE offers a scientifically validated way to monitor exercise intensity. RPE can then by multiplied by duration to calculate session-RPE, a measure of internal training load.
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However, one common mistake is modifying the scale. Adding colours, emojis, or extra descriptors might feel helpful, especially with youth or amateur athletes, but it compromises the tool’s validity.
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The original Borg 6–20 and CR-10 scales were designed with intention. Descriptors were placed based on heart rate response. The scaling isn’t linear by accident, there’s research behind the design. When we tinker with it, we risk introducing bias.
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Sometimes the most powerful tools are the simplest. To keep RPE effective, stick to the original scales and use the validated descriptors.
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Let’s not overcomplicate what already works.
🎥 For a full explanation, watch the full video:
👇 youtu.be/YqXvO49Qy2I
🎥 For a full explanation, watch the full video:
👇 youtu.be/YqXvO49Qy2I
