RPE (Rate of Perceived Exertion)
The 1-10 scale used to gauge training intensity and auto-regulate load from set to set.
What is RPE?
RPE (Rate of Perceived Exertion) is a 1-10 scale measuring how hard a set felt, based on Reps In Reserve (RIR) — how many more reps you could have done with good form.
The Scale (Zourdos et al. 2016)
| RPE | Reps in Reserve | Feels Like |
|---|---|---|
| 10 | 0 (failure) | Maximum effort — no reps left |
| 9.5 | 0-1 | Grinding last rep |
| 9 | 1 | Could do 1 more rep |
| 8.5 | 1-2 | Getting challenging |
| 8 | 2 | Could do 2 more (target working set) |
| 7.5 | 2-3 | Moderate effort |
| 7 | 3 | Could do 3 more reps |
| 6 | 4+ | Warmup / easy |
| 5 & below | many | Very easy |
Why Track RPE?
1. Auto-regulation Your capacity varies day-to-day based on sleep, stress, food, hydration. RPE lets you adjust load in real-time instead of blindly following a pre-written program.
2. Avoid overtraining Seeing all sets logged at RPE 10 for weeks = you're always at failure. This compromises recovery and long-term progress. Target RPE 7-8 for most working sets.
3. Detect progress (or lack thereof) If same weight/reps starts feeling easier over weeks (RPE 8 → 7 → 6), you're getting stronger — time to add weight.
4. Guide progression When you're consistently hitting a weight at RPE 7, add weight next session to bring it back to RPE 8.
Typical RPE Targets by Training Goal
| Goal | Working Set RPE | Why |
|---|---|---|
| Strength (powerlifting) | 7-9 | Heavy loads, lower volume |
| Hypertrophy (muscle growth) | 7-9 | Moderate loads, proximity to failure matters |
| Endurance | 5-7 | Higher reps, lower intensity |
| Deload | 4-6 | Intentionally easy, recovery focus |
How to Assign RPE Accurately
After each set, ask yourself: "If the spotter had stepped away, how many more reps could I have done with good form?"
- "Definitely 2 more, maybe 3" → RPE 8
- "Maybe 1 more" → RPE 9
- "Nothing left, that last rep was barely" → RPE 10
Calibration for Beginners
Research shows beginners often underestimate RPE (they think they're at 8 when they're actually at 6). This corrects with experience over 2-3 months of consistent logging.
Don't worry about perfect accuracy at first — the important thing is tracking your perception over time. Patterns emerge.
RPE vs %1RM
Some programs use percentage of 1-rep max. RPE is more flexible because:
- No need to test your max
- Accounts for daily fluctuation
- Works for all rep ranges
Rough equivalents (from Helms et al. 2018, for trained lifters):
| Reps | RPE 8 ≈ %1RM |
|---|---|
| 1 | 93% |
| 3 | 86% |
| 5 | 80% |
| 8 | 72% |
| 10 | 67% |
| 12 | 63% |
Red Flags to Watch For
- All sets at RPE 10 every workout → overreaching, not sustainable
- All sets at RPE 5-6 → undertrained, not progressing
- RPE increasing week-over-week at same weight/reps → accumulated fatigue, may need deload
- RPE decreasing at same weight/reps over 3-4 weeks → time to increase weight
References
- Zourdos et al. (2016). Novel Resistance Training-Specific Rating of Perceived Exertion Scale Measuring Repetitions in Reserve. JSCR.
- Helms et al. (2018). RPE and Velocity Relationships for the Back Squat, Bench Press, and Deadlift in Powerlifters. JSCR.
Where this is used in the app
- •Workouts page — required RPE per set
- •Programs page — intensity guidance