What is Autoregulation?
Autoregulation is a training approach where you adjust workout intensity based on daily readiness and performance rather than following rigid, predetermined weights. Instead of "lift 100kg for 5 reps," you might prescribe "lift for 5 reps at RPE 8"—letting the weight vary based on how you feel that day.
Autoregulation in strength training was pioneered by powerlifter Mike Tuchscherer through his Reactive Training Systems (RTS) methodology. He adapted the Borg RPE scale from cardio training to resistance training, revolutionizing how strength athletes program their training.
The Problem with Fixed Percentages
Traditional programming prescribes weights as percentages of your 1RM. While simple, this approach has limitations.
Daily Fluctuations
Your true strength varies day-to-day based on sleep, stress, nutrition, and fatigue. 80% of your 1RM might feel like 75% on a good day or 85% on a bad day.
Outdated Maxes
Your 1RM changes over time. If you tested it months ago, percentages are based on old data that may not reflect current strength.
Exercise Variation
Different exercises have different percentage relationships. Your squat RPE curve isn't the same as your bench press curve.
Autoregulation solves these problems by measuring the actual difficulty of each set, not the theoretical difficulty based on percentages. You adjust load to achieve the intended training effect and support progressive overload.
Understanding the RPE Scale
RPE (Rate of Perceived Exertion) measures how hard a set felt on a scale of 1-10. In strength training, we primarily use RPE 6-10. This relates closely to training to failure concepts.
| RPE | Description | Reps Left |
|---|---|---|
| RPE 10 | Maximum effort, couldn't do another rep | 0 (failure) |
| RPE 9.5 | Maybe could have done 1 more, uncertain | 0-1 |
| RPE 9 | Definitely had 1 more rep | 1 |
| RPE 8.5 | Definitely 1, maybe 2 more reps | 1-2 |
| RPE 8 | Could have done 2 more reps | 2 |
| RPE 7 | Could have done 3 more reps | 3 |
| RPE 6 | Could have done 4+ more reps | 4+ |
RPE scale for strength training with corresponding reps in reserve
After each set, ask yourself: "How many more quality reps could I have done if my life depended on it?" Be honest. Most lifters initially overestimate their RPE (thinking sets were harder than they were).
Understanding RIR (Reps In Reserve)
RIR is a more direct measurement—simply count how many reps you had "in the tank" when you stopped.
| RIR | Meaning | Equivalent RPE |
|---|---|---|
| RIR 0 | Hit failure, no reps left | RPE 10 |
| RIR 1 | Could do 1 more rep | RPE 9 |
| RIR 2 | Could do 2 more reps | RPE 8 |
| RIR 3 | Could do 3 more reps | RPE 7 |
| RIR 4 | Could do 4 more reps | RPE 6 |
RIR and RPE conversion chart
They're interchangeable. Some prefer RPE because it's a positive scale (higher = harder). Others prefer RIR because it's more concrete. Most programs use RPE for compounds and RIR for accessories. Use whichever feels more intuitive.
How to Use Autoregulation in Practice
Here's how to implement RPE-based training in your workouts.
Warm Up to Your Working Weight
Perform warm-up sets with increasing weight. Pay attention to bar speed and how each set feels. This calibrates your RPE sense for the day.
Hit Your Target RPE
If the program says "5 reps @ RPE 8," work up until 5 reps feels like you could do 2 more. The weight doesn't matter—the effort level does.
Adjust Mid-Workout
If set 1 was RPE 8 and set 2 feels harder, you can keep the weight or reduce slightly. The goal is consistent RPE across sets, not necessarily consistent weight.
Log Everything
Record weight, reps, AND RPE for each set. Over time, this data reveals your true progress and daily readiness patterns.
What RPE Should You Train At?
Different RPE ranges serve different purposes in your training.
| RPE Range | Best For | Notes |
|---|---|---|
| RPE 6-7 | Warm-ups, technique work, deloads | Minimal fatigue, high quality reps |
| RPE 7-8 | Volume work, accessories, most training | Sweet spot for hypertrophy |
| RPE 8-9 | Main lifts, strength focus | Standard working set intensity |
| RPE 9-10 | Testing, peaking, occasional top sets | Use sparingly, high fatigue |
Recommended RPE ranges for different training purposes
Training to true failure every set leads to excessive fatigue, poor recovery, and eventual burnout. Most working sets should be RPE 8-9. Save RPE 10 for occasional testing or competition.
Improving Your RPE Accuracy
Learning to gauge RPE accurately takes practice. Here are strategies to improve.
Test Occasionally
Once per month, do an AMRAP at a weight you estimate is RPE 8. If you get 4+ reps, your RPE estimation is off.
Track Patterns
Log RPE after every set. Over weeks, you'll see patterns—maybe you always underestimate squats but overestimate bench.
Give It Time
RPE accuracy takes 3-6 months to develop. Don't expect perfection immediately. The skill improves with experience.
Other Autoregulation Methods
RPE/RIR isn't the only way to autoregulate. Here are other approaches.
Use a device to measure bar speed. When velocity drops below a threshold (e.g., 0.5m/s for strength), you've reached target intensity or should end the set.
Stop the set when rep quality noticeably deteriorates—technique breaks down, bar speed drops significantly, or you need to grind. Simple and effective.
Track heart rate variability daily. Lower HRV suggests accumulated fatigue—adjust training intensity down. Higher HRV means you can push harder.
Who Benefits Most from Autoregulation?
Great For
- Intermediate/advanced lifters
- Those with variable schedules
- Athletes managing high stress
- Powerlifters and strength athletes
Less Ideal For
- Complete beginners (need to learn the skill)
- Those who need strict structure
- People who consistently sandbag
- Those who lack body awareness