Effort Delta

Formula

Example

Target RPE: 7.0. Actual RPE: 7.8. Effort Delta = +0.8 (amber flag, slightly harder than planned).

How Afitpilot Uses This

Effort delta is one of three comparison domains (alongside volume and load) in our Target vs. Actual analysis. We use threshold-based color coding: neutral (< 0.7), amber (0.7-1.2), red (> 1.2). A consistently positive effort delta over multiple sessions ("effort creep") may indicate accumulated fatigue, poor recovery, or prescriptions that need adjustment.

What your effort delta is telling you

Known Limitations

• •The thresholds (0.7 / 1.2) are based on general coaching heuristics, not individualized to the athlete. An experienced lifter may have tighter natural RPE variance than a beginner.
• •A single session's effort delta is noisy. The trend over 4-6 sessions is far more meaningful than any individual reading.

What We're Improving

• Future

  Individualized Alert Thresholds

  Replace static delta thresholds (0.7 / 1.2 RPE, 10% / 25% volume/load) with personalized thresholds derived from each athlete's historical variance.

• Shipped

  Universal Internal-Load Currency (sRPE → AU)

  Move from tonnage-as-primary to a universal session-load number using Foster's sRPE × duration method. AU is now the headline load metric on every session card and rolls up weekly with a 3-bucket modality split (Strength / Endurance / Mixed). Tonnage stays visible as a strength-specific secondary.

Science Context

Monitoring the gap between prescribed and perceived intensity is a core principle of autoregulated training (Mann et al., 2010). Chronic effort overshoot is associated with non-functional overreaching and may precede performance plateaus.

Related Terms

• AMRAPA conditioning format where you complete as many full rounds (or reps) of a prescribed set of movements as possible within a fixed time cap. AMRAP flips the usual work-then-rest structure: instead of a target number of rounds at an unknown pace, you fix the time and let the round count be the outcome, the score is the honest measure of how much work you produced.
• EMOMA conditioning format where you perform a prescribed set of reps at the start of every minute, then rest for whatever time remains before the next minute begins. EMOM trades AMRAP's pacing freedom for a forced rhythm, the clock, not your own judgement, decides when the next round starts.
• TabataA high-intensity interval format of 20 seconds of maximal effort followed by 10 seconds of rest, repeated for 8 rounds (4 minutes total per exercise). Tabata is one of the few interval structures with a specific named research study behind its exact timing, the 20/10 split isn't an arbitrary convention, it's what the original protocol tested.
• ChipperA long list of movements performed once through, front to back, in order, you 'chip away' at the list rather than repeating rounds. Chippers are the opposite structural choice from AMRAP or EMOM: instead of a short list repeated many times, it's a long list done once, usually against the clock for time.
• RPE (Rate of Perceived Exertion)A 1-10 self-reported scale measuring how hard a set felt. In strength training, RPE is anchored to "reps in reserve" (RIR): RPE 10 means you couldn't do another rep, RPE 8 means you had roughly 2 reps left, RPE 6 means about 4 reps in reserve.