The Personal Record Breakdown (PR breakdown) offers an overview of the heaviest weight you have lifted for each exercise at a specified number of reps, along with an estimated maximum weight.
PR Breakdown Table
The PR Breakdown Table presents all rep counts at once for quick access.
"My Best" indicates the maximum weight you've lifted for the exercise, representing your highest lift for the specified reps.
"Predicted" is the estimated weight you can lift for the specified reps, helping you decide how much weight to use for sets. This prediction uses your data from the last 90 days and is updated daily.
The first row in the predicted column essentially shows your estimated 1 rep max (1RM) for this exercise.
The highlighted row indicates the heaviest weight you have used for this exercise regardless of reps (your weight personal record (PR)).