How do you test your 1RM safely?
Short answer: warm up, then work up to your max in jumps that get smaller as the bar gets heavier, with a spotter or safety arms in place. A simple progression is 50%, 70%, 80%, 90% and 95% of the max you plan to hit, then 100%. For a planned 140 kg squat that is 70, 97.5, 112.5, 125, 132.5 and 140 kg.
Example: a test day for a 140 kg squat
Pick a planned max first: a recent best single, or an estimate from a hard set of 3 to 5 (see how 1RM is calculated). Then take each percentage of it and round to a weight your plates can make:
| Set | % of planned max | Weight | Reps |
|---|---|---|---|
| 1 | 50% | 70 kg | 5 |
| 2 | 70% | 97.5 kg | 3 |
| 3 | 80% | 112.5 kg | 1 |
| 4 | 90% | 125 kg | 1 |
| 5 | 95% | 132.5 kg | 1 |
| 6 | 100% | 140 kg | 1 |
The exact 70% of 140 kg is 98 kg, and 97.5 kg is the nearest weight with kilo plates on a 20 kg bar. Every row is rounded the same way. The reps are a common pattern: a few reps while the bar is light, then singles so you save your energy for the top.
Example: a test day for a 315 lb bench press
The same percentages of a planned 315 lb max, rounded to weights you can load with pound plates on a 45 lb bar:
| Set | % of planned max | Weight | Reps |
|---|---|---|---|
| 1 | 50% | 160 lb | 5 |
| 2 | 70% | 220 lb | 3 |
| 3 | 80% | 250 lb | 1 |
| 4 | 90% | 285 lb | 1 |
| 5 | 95% | 300 lb | 1 |
| 6 | 100% | 315 lb | 1 |
The top attempt is three 45 lb plates on each side of the bar. To see the plates for any of the other sets, enter the weight in the plate calculator.
Before you test
- Come in rested. Test after a lighter week or at the end of a training block, not after a hard session.
- Decide what counts. Squat depth, a pause on the chest for the bench, lockout on the deadlift. Hold every attempt to the same standard you will use next time.
- Use the same setup. Belt or no belt, the same bar and the same unit. A max belongs to its conditions.
- Warm up your body before the bar. A few minutes of easy movement, then the first set of the table.
Safety: spotters, safety arms and missing a rep
A heavy single can fail without warning, so plan the miss before you lift.
- Squat inside a rack with the safety arms set just below the bottom of your squat. If you miss, sit down onto them.
- Bench with a spotter who knows when to take the bar, or with safety arms set just below your chest. Never test a bench max alone without them.
- On the deadlift, a miss is simply putting the bar down. Keep the area around the platform clear.
- Stop if something hurts. A sharp pain is a reason to end the session, not to take the next attempt.
Choosing the last jump
The 95% single tells you a lot. If it moved fast, take your planned max. If it was slow or your form slipped, stop there or take a smaller final jump, and count the 95% single as the day's result. If you miss the max, try it once more at most; a third try at the same weight rarely goes better than the second.
After the test
A max you lifted is your 1-rep PR for that lift. In the LoadPR app, log it as an entry with 1 rep: if it is your heaviest entry for the lift, it becomes your current PR, and the percentage wheel can work from it. See PR tracking. To set training weights from your new max for other rep counts, use the rep max chart.
Mistakes on test day
- Too many warm-up reps. Sets of 5 near the top tire you before the single that matters.
- A big last jump. Going from 90% straight to a new max is how attempts get missed.
- No plan for a miss. Set the safety arms or brief the spotter before the first heavy single, not after.
- Changing the standard. A higher squat or a bounced bench gives a bigger number that you cannot repeat.
- Testing too often. Between tests, estimate your max from a hard set instead.
FAQ
How do you warm up for a 1RM test?
Work up through lighter sets to singles. For a planned 140 kg squat: 70 kg for 5, 97.5 kg for 3, then singles at 112.5, 125 and 132.5 kg before 140 kg.
How many sets does a 1RM test take?
In this pattern, six: 50%, 70%, 80%, 90% and 95% of the planned max, then 100%. For a 315 lb plan that ends 285, 300 and 315 lb.
What should my last warm-up be before a 315 lb max?
95% of 315 lb is 299.25 lb, so load 300 lb (45, 45, 35 and 2.5 on each side), then take 315 lb.
Should I test my 1RM or estimate it?
Estimate between tests and test now and then. 100 kg for 5 reps already gives an estimated 116.67 kg by Epley without a max attempt.
Do I need a spotter to test my 1RM?
For the bench press, yes, or safety arms set just below your chest. Even the 90% single of a 140 kg plan, 125 kg, can stall without warning.