Proven program, faithfully implemented
nSuns 531 LP
nSuns 531 LP is 5/3/1 rebuilt as a high-volume linear progression — around nine sets of a main lift and eight of a secondary in a single day, all as percentages. Its top set is an AMRAP, and the reps you get there set next week's training max from a table, so the programme adjusts weekly rather than every cycle.
About the program
Created by: u/nSuns — nSuns 531 LP (Reddit).
Who it's for
- Best for: Strength, if you have the time and recovery for a great deal of work per session.
- Experience: Intermediate to advanced. Start the training maxes at 90% of your 1RM or lower — the volume is the part that catches people out, not the intensity.
- Time: Four to six days a week, and the sessions are long. Progression is weekly.
How it's built
The shape of the program — sessions, sets and rep scheme. Iron Forge fills in the exact weights for you from your maxes.
Week
Day 1 — Bench / OHP
- Barbell Bench Press — 1×5, 1×3, 1×1+, 3×3, 2×5, 1×5+
- + 1 more exercise
Day 2 — Squat / Deadlift
- Barbell Squat — 1×5, 1×3, 1×1+, 3×3, 2×5, 1×5+
- + 1 more exercise
Day 3 — OHP / Bench
- Overhead Press — 1×5, 1×3, 1×1+, 3×3, 2×5, 1×5+
- + 1 more exercise
Day 4 — Deadlift / Squat
- Deadlift — 1×5, 1×3, 1×1+, 3×3, 2×5, 1×5+
- + 1 more exercise
How Iron Forge runs it
How it works
nSuns 531 LP is a high-volume linear-progression spin on 5/3/1. Each training day has a main lift done for around nine sets that ramp up to a heavy top set, plus a secondary lift for about eight sets — all as percentages of a Training Max. The signature feature is the top AMRAP set on the main lift: the reps you hit there decide how much your Training Max goes up for next week, so progression is fast but self-regulating. Templates run 4, 5 or 6 days a week.
The AMRAP-driven progression
On the main lift's top set you rep out, and a simple table sets next week's TM bump: roughly 0 reps → hold or lower the TM, 1–2 reps → +5 lb2.5 kg (small lifts) / small bump, 3–4 → a bit more, 5+ reps → the biggest jump (up to ~+10–15 lb5–7.5 kg on lower-body lifts). Because it's tied to performance every week, you climb quickly when you're fresh and the increases automatically ease off when a lift gets hard.
Training maxes and volume
Start each TM at 90% of your 1RM — or lower if you're new to the volume, because nSuns is a lot of work per session. The many back-off sets after the top set build the strength that makes next week's AMRAP bigger. Pick a template (4/5/6-day) that matches your recovery; more days spread the lifts out but demand more from your schedule and eating.
nSuns 531 LP in Iron Forge
FAQ
- Why are there so many sets per lift?
The main lift ramps over ~9 sets to a heavy top AMRAP, then does back-off volume; the secondary lift adds ~8 more. That volume is what drives the fast weekly progression — but it's why you should start the TM conservatively.
- How does my Training Max go up?
By how many reps you hit on the 95% top set, on a fixed scale: 0 or 1 rep and it holds, 2 or 3 adds 5 lb2.5 kg, 4 or 5 adds 10 lb5 kg, and 6 or more adds 15 lb7.5 kg. That is the whole autoregulation — a strong week earns a bigger jump and a bad one costs you nothing but the week.
- What should I set my Training Max to?
About 90% of a true 1RM — or lower if you're new to this much volume. Starting too high makes the top sets grind and stalls you quickly.
- How many days a week is it?
Four, as it ships here. Each day pairs one lift heavy with another for volume, so all four lifts get both treatments across the week. The five- and six-day versions that exist elsewhere are not in the app.
- Is nSuns good for a beginner?
It works for late-beginners/early-intermediates who recover well and eat enough, but the volume is high. A true novice is usually better served by a simpler LP (Starting Strength, StrongLifts) first.
- What if I hit 0 reps on the top set?
That's the signal your TM is too high for that lift — hold it, or drop it slightly, so the next week's top set is achievable again. The programme self-corrects around your actual strength.
- Why does the main lift have two + sets?
Because nSuns has two rep-outs per main lift and they do different jobs. The 95% single is the one that counts — the reps you get there decide next week's training-max jump. The 5+ at the end of the descent is volume: take it as far as is useful, and know that going all out on it changes nothing about your progression.
- What is the second lift each day for?
Volume. Every day pairs a heavy lift with a second one worked at around 70% of its training max for eight sets — 6, 5, 3, 5, 7, 4, 6, 8 reps — with no rep-outs at all. It runs off the same training max as when that lift is the heavy one, so the two halves of the week stay in step. It is where most of the size work in this programme lives.
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