Powerlifting
Effort, on the day.
A 5-rep max changes every day — sleep, stress, accumulated volume. Your prescription should change too. FitX runs RPE autoregulation on the Zourdos scale: you log the effort you actually felt, the app adjusts the next set’s load. No more grinding percentages on a bad day.
What FitX brings to the platform.
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RPE autoregulator
Log RPE after each set. Next set’s load adjusts against the validated Zourdos scale — you converge on your true effort zone, not a paper percentage.
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DUP cycle planner
Daily undulating periodization across intensity and volume days. Configure your week, the app schedules the exact rep ranges — no more guessing Wednesday’s squat session.
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Nervous-system fatigue tracker
Heavy singles and doubles drain CNS, not just muscle. FitX watches cumulative high-intensity exposure and warns before you dig a hole.
Why RPE is better than %1RM.
Zourdos and colleagues showed in 2016 that a rep-in-reserve RPE scale predicts the true limit of a set more accurately than any fixed percentage of 1RM — because 1RM itself drifts daily. FitX uses the same scale to modulate load intra-session, not just prescribe it.
Read the full methodologyA DUP week — five sessions, each coloured by average target RPE.
Ready to train the effort, not the number?
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