How to record weight so future comparisons make sense
Separate units, equipment conventions and warm-up work.
Write the unit with the number
Twenty kilograms and twenty pounds are not the same load. One international avoirdupois pound equals 0.45359237 kilograms. When changing units, check how your app displays existing records rather than assuming that a different label proves a conversion occurred.
Choose a dumbbell convention
A pair of 10 kg dumbbells could be written as 10 kg per hand or 20 kg combined. Pick a convention and keep it consistent. If a field does not show that distinction, preserve the convention in a separate note. Do not mix both methods in one progress chart.
Include the bar consistently
For a barbell exercise, decide whether the recorded value includes the bar and keep that basis stable. Machine stacks have their own labels and mechanical arrangements. Use the same machine when making close comparisons, and avoid comparing stack numbers across equipment as if they were identical.
Separate warm-up and working sets
A warm-up entry and a demanding working set can serve different purposes even when both contain repetitions. Keep enough context to understand the session later. Completed-set totals alone do not describe training difficulty.
Read volume as a record, not a verdict
Weight multiplied by repetitions and summed across sets is a useful bookkeeping measure for loaded work. It does not directly measure muscle growth or movement quality, and bodyweight work needs different context. JJ FIT summaries are most useful when your input convention remains consistent.