Automatic Personal Records and 1RM Tracking | Strongbro
Quick answer
Strongbro checks every logged set against your history and records two kinds of PR automatically: your best weight at each rep count, and your estimated one-rep max per exercise. The Records screen shows the heaviest lift per exercise per month, so progress reads at a glance.
Every set you save is checked against your history, so records update without you watching for them.
Each exercise keeps two kinds. The first is weight at reps: your best 80 kg for 8 is tracked separately from your best 100 kg for 1, and each rep count holds its own record. The second is an estimated one-rep max, calculated from your best set, which gives a strength trend for lifts you never actually max out on.
The records screen
One row per exercise per month, showing the heaviest lift and the day it happened. A year of training is about fourteen rows rather than four hundred.
The estimate uses the Brzycki formula, weight × 36 ÷ (37 − reps), which is the same arithmetic behind the one-rep max calculator on this site. It's reliable enough under about six reps and drifts optimistic above ten, so treat a set of fifteen as a volume record rather than a strength one.
A record from a backdated session counts on the day it happened, not the day you typed it in. Records are only checked on sets with a weight, so bodyweight and cardio entries don't produce them.
Where records show up
A new record sends a notification naming the lift and the number, and feeds the rank and insights screens. It makes no difference whether the set arrived by voice or from the keypad.
Frequently asked questions
How is the estimated 1RM calculated?
With the Brzycki formula from your best weight-and-reps set. It's an estimate for tracking direction, not a licence to attempt a true max — the trend is the point.
Do I need to mark a set as a PR attempt?
No. Every set is checked automatically as it's saved, whether it came from voice or the keypad. When a set beats your history, the record updates and the app tells you.
Can old workouts create records?
Yes. Records carry the date of the set that earned them, so importing or back-logging a session slots into the timeline correctly.
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