RPE vs. Percentage-Based Training: How to Track Both in Your Logbook

Percentage-based training prescribes loads as a fraction of your one-rep max or training max. If your squat training max is 400 lbs and your program calls for 75%, you load 300 lbs. The advantage is objectivity — the number is the number. The disadvantage is that your 75% on a great day is very different from your 75% on a day when you slept four hours and skipped breakfast.

RPE — Rate of Perceived Exertion — measures how hard a set felt on a 1-10 scale. An RPE 8 means you had roughly 2 reps left in the tank. RPE 10 means absolute failure. The advantage is that RPE automatically accounts for daily readiness. The disadvantage is subjectivity — RPE 8 for one lifter might be RPE 6 for another, and beginners are notoriously bad at rating their own effort.

Neither system is complete on its own. Percentages give you precision but ignore readiness. RPE gives you adaptability but requires calibration. The best tracking systems use both.

The standard RPE scale for strength training runs from 6 to 10. Below 6, the weight is essentially a warm-up and does not need RPE tracking.

Percentage-based notation requires a reference point — your training max. Most programs (like 5/3/1) use 85-90% of your true one-rep max as the training max, building in a buffer for sustainable progression.

In your logbook, record three numbers for percentage-based work: the prescribed percentage, the actual weight loaded, and the reps completed. This triple record is essential because it lets you see when a percentage feels harder or easier than it should.

Example notation: '75% | 300 lbs | 5 reps.' If your program prescribed 5 reps at 75% and you got them, you are on track. If you only got 3, something is off — fatigue, poor sleep, or your training max needs adjustment. If you got 8, your training max might be set too low.

Write your training max at the top of every page or on a reference card you keep inside the logbook. Recalculate it at the end of every training cycle, not mid-cycle. Changing your training max too frequently defeats the purpose of percentage-based programming.

The most powerful approach is tracking both percentage and RPE on the same sets. This creates a feedback loop that neither system provides alone.

Here is how to notate it: '75% | 300 lbs | 5 reps | @RPE 8.' That single line tells you the prescribed intensity, the actual load, the work completed, and how hard it felt. Over several weeks of this data, you can see patterns that are invisible with either system alone.

When percentages and RPE align, your training max is well-calibrated and your recovery is solid. When 75% feels like RPE 9, something is wrong — under-recovery, accumulated fatigue, or a training max that needs adjustment. When 80% feels like RPE 7, you are peaking and your training max probably needs to go up.

Programs like Average to Savage 2.0, Juggernaut Method, and modern 5/3/1 variants already use this hybrid approach. Your logbook should support it by including columns for both prescribed percentage and actual RPE. The GZCLP program uses a similar auto-regulation concept where AMRAP sets reveal whether to progress — this is essentially RPE feedback built into percentage-based loading.

Your logbook page for main lifts should have these columns from left to right: Set number, Prescribed % or RPE target, Weight loaded, Reps prescribed, Reps completed, Actual RPE, and Notes. This seven-column layout captures everything you need without being so wide that writing becomes cramped.

For accessories, simplify to four columns: Exercise, Weight, Reps, and RPE. Accessories do not need percentage tracking because they are rarely programmed from a training max.

Add a session summary section at the bottom of each page: Training Max reference (did it need adjustment?), Overall energy rating (1-10), Sleep last night (hours), and one sentence on the session quality. This context data is what makes your logbook a diagnostic tool, not just a record.

Use percentages as the primary driver when you are running a structured program with prescribed loads (5/3/1, Sheiko, Candito), during the early phases of a training cycle when volume is high and intensity is moderate, and when you are a beginner who has not yet calibrated their RPE sense.

Use RPE as the primary driver when you are an experienced lifter with good self-awareness, during high-intensity phases where daily readiness varies significantly, during meet prep peaking when auto-regulation prevents overreaching, and when running auto-regulated programs like Average to Savage 2.0.

Use both simultaneously when you want the precision of percentages with the safety net of RPE, when you are transitioning between programs or testing a new training max, and always on your top sets — they deserve the full data capture.