The number this tool hands back is smaller than the weight you can actually lift, and that gap is the entire idea. Here is what a training max is, why programming under your real strength is what makes the plan work, and how to raise it.
What a training max is
Your one rep max, or 1RM, is the heaviest weight you can move for a single rep on a good day. Your training max is a deliberately smaller number that every working set is calculated from. In Jim Wendler's 5/3/1 it sits at roughly 90 percent of that true max, and Wendler has since pushed most lifters toward 85 percent, which is why this page offers both.
Why the buffer is the point
Programming under your max is not a cautious compromise, it is the mechanism. Sleep, stress, and a hard week all move what you can lift on a given day, so a plan built on your ceiling only works when everything lines up. The buffer keeps the prescribed reps hittable on an ordinary Tuesday. Each week also ends with an AMRAP set, meaning as many reps as possible, so new strength shows up as extra reps instead of a missed lift.
A worked example
Say your bench 1RM is 315 lbs and you pick the standard 90 percent. Your training max is 283.5 lbs, and the cycle builds out like this.
- Week 1, fives: 185, 212.5, then 240 lbs for 5 or more
- Week 2, threes: 197.5, 227.5, then 255 lbs for 3 or more
- Week 3, 5/3/1: 212.5, 240, then 270 lbs for 1 or more
- Deload: 112.5, 142.5, 170 lbs
The heaviest single all cycle is 270 lbs, a full 45 lbs under the 315 you can hit fresh. That is the buffer doing its job.
Raising it, and the ego trap
Add 5 lbs to upper body lifts and 10 lbs to lower body lifts each cycle, or 2.5 kg and 5 kg if you work in kilos, and only when you cleared the required AMRAP reps with something to spare. The classic mistake is skipping that condition and inflating the training maxbecause a bigger number feels better. It survives a cycle or two, then the top sets stop moving, the AMRAP shrinks to the bare minimum, and a plan meant to run for a year stalls in month two. If you miss reps, cut the training max by about 10 percent and build back.
What to do with your number
Write it down, leave it alone for the cycle, and let the AMRAP sets tell you whether you set it well. If you have never tested a true single, estimate one with the one rep max calculator and start conservative. If the weights land on awkward numbers, plate loading works out what to hang on the bar, and RPE to percentage checks whether a top set felt like the effort it was meant to.