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Shape Tools – Rate of perceived exertion (RPE)

This is used to gauge your intensity in cardio workouts. Here’s what the numbers mean in our fitness stories:

RPE 1-2: Very easy. You can converse with no effort.
RPE 3: Easy. You can converse with almost no effort.
RPE 4: Moderately easy. You can converse comfortably with a little effort.
RPE 5: Moderate. Conversation requires some effort.
RPE 6: Moderately hard. Conversation requires quite a bit of effort.
RPE 7: Difficult. Conversation requires a lot of effort.
RPE 8: Very difficult. Conversation requires maximum effort.
RPE 9-10: Peak effort. No-talking zone.