You select the same weight as last week, but the movement feels different. Before interpreting that as a change in strength, check the machine setup. A different seat or pad position can change the exercise you are performing.
Ask a qualified trainer to show you the adjustment for that particular machine and your needs. Read the equipment instructions. The number printed beside a seat is a position marker, not a universal setting that transfers to every machine with a similar name.
Record enough to repeat the setup
Alongside the exercise, load and repetitions, note the machine identifier and relevant seat, backrest or pad settings. Keep the note short enough to use during a session. A photograph may help if the gym permits it and no other person is captured without permission.
For an illustrative record, “Machine B, seat 4, backrest 2” is more informative than “same as usual”. If the gym replaces the equipment, treat the old numbers as a reference to the previous machine rather than instructions for the new one.
Check before loading the movement
Make adjustments with the equipment safely at rest and follow the instructions for locking pins or levers. Ask staff if a component does not secure properly. Do not improvise a substitute pin or use a machine with an uncertain adjustment.
Repeat the movement only as instructed and stop if it causes pain or feels unsafe. A recorded setting is not proof that the setup remains suitable after an injury, a change in ability or a different exercise variation.
When reviewing progress, compare sessions that used the same equipment and intended setup where possible. This makes the log more interpretable without pretending that a weight number alone measures the whole session. A useful record describes the work you actually did, including the position from which you did it.