What Is a Personal Record (PR)? The Three Types | Strongbro
Quick answer
A personal record, or PR, is the best result you have ever logged for an exercise under a defined condition. Strength training uses three common types: a weight-at-reps PR, such as your heaviest 5-rep squat; an estimated one-rep max PR, your best set converted into a 1RM figure; and a volume PR, the most total weight moved in a session or a week. Each is only as reliable as the log it is checked against.
A personal record is your best logged result for an exercise under a stated condition. The condition is the part that gets dropped. Two lifters can both say "bench PR" and mean different things: one lifted a heavier single, the other did more reps at the same weight. Until you say which record you mean, the word carries almost no information.
The three kinds
A PR is a comparison: today's set against every previous set of the same exercise, under one rule. The rule is what separates the types.
A weight-at-reps PR is your heaviest weight for a given rep count. Each rep count keeps its own entry, so a 5-rep record and a 1-rep record are separate things. This is the most common kind in a log, and the most frequent, because you can set a new 8-rep record without going anywhere near your best single.
An estimated 1RM PR takes your best set and converts it into a single-rep figure with a formula such as Brzycki, where 1RM equals weight × 36 ÷ (37 − reps). It exists so that sets at different rep counts can be compared at all. It moves whenever any set implies a higher max, which makes it the cleanest single trend line for strength.
A volume PR is the most weight × reps summed across a session, an exercise or a week. It rewards work capacity rather than peak strength, and it is the record a hypertrophy block tends to break.
One lifter, one lift, one ordinary Tuesday. Her bench history includes 60 kg × 8, an estimated 1RM of 74 kg, and 72.5 kg × 3, an estimated 1RM of 77 kg. Today she presses 65 kg × 7. That is a new 7-rep weight-at-reps record. Its estimated 1RM is 65 × 36 ÷ 30 = 78 kg, so the e1RM record moves too, even though 65 kg is lighter than the 72.5 kg she has already pressed. Her session volume of 1,655 kg across 4 sets beats last month's best bench session of 1,560 kg, and that is a third record from the same hour. None of them needed a max attempt.
Why a log has to check them
Weekly volume tells you how much you worked. Records tell you whether the work is producing strength. Without them, "I think I am getting stronger" stays a feeling instead of a dated list of lifts that got heavier.
Automatic detection is the practical half of that. A record you have to spot yourself gets missed on the day it happens, the estimated 1RM kind especially, since nobody runs that arithmetic between sets. And software checks against everything you have logged rather than against the one session you happen to remember. In Strongbro, every saved set is compared against your history for weight-at-reps and estimated 1RM, and the Records screen keeps one row per exercise per month, so a quarter reads as a timeline.
Defining the record precisely also stops the wrong type from misleading you. An estimated 1RM taken from a 15-rep set is a rough number, because the formulas are built around lower rep counts and turn optimistic past about 10 reps. Weight-at-reps records have no such problem, which is the argument for tracking both.
Where the word gets slippery
Conditions drift. A paused bench and a touch-and-go bench are different exercises for record purposes, so either log them under separate names or accept that the record is muddy.
Chasing only the 1-rep record is the other habit worth breaking. Singles are the rarest PR and the most fatiguing to attempt, while most of a year's visible progress turns up first in the 5-, 8- and 10-rep records. The estimated max is a trend number in the same way. A rising e1RM means the training is working. It is not an instruction to load the bar to that figure and find out.
Two small ones. A record is only useful with the date attached, so back-logged sessions should carry the day they happened rather than the day you typed them in. And keeping records in your head does not work. Memory rounds up. A log rounds to the kilogram.
The maths behind the second type is in one-rep max. For the weekly routine that actually catches records, see how to track personal bests in the gym.
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Frequently asked questions
What is the difference between a PR and a PB?
None in practice. PR, for personal record, is the common term in North America; PB, for personal best, is the term in the UK and Australia. Both mean your best logged result for an exercise under a stated condition. The condition is what matters: a 5-rep best and a 1-rep best are different records either way.
Is an estimated 1RM PR a real PR?
It is a real record of a real set, expressed as a single number. The figure is calculated rather than lifted, so it works best as a trend: when it rises, the training is working. It is least reliable above about 10 reps, which is why a good log keeps weight-at-reps records alongside it.
Does a PR count if I used a different variation?
Only against the same variation. A paused squat, a high-bar squat and a box squat load the body differently, so a record set on one does not transfer to the others. Log each as its own exercise, or keep a note on the set, and the comparison stays fair and the record keeps its meaning.
How often should I expect to set a PR?
Beginners often set weight-at-reps records most weeks, because early strength gains come fast. Intermediate lifters see them every few weeks, usually at the higher rep counts first. A month with none is normal. Three months with none on any lift is worth investigating: check sessions, volume and sleep before blaming the program.
Why should an app detect PRs instead of me?
Because the check runs against every set you have ever logged, including the estimated 1RM, which you are not calculating between sets. Software does it the moment the set saves and attaches the date. Human memory compares against last week, and rounds up while it does so.
What this is based on
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