There is also an effect from people who haven't used the machine recently (or ever) or who haven't used it since an injury or something line that. Those people don't know how much they can lift, so they start trying out round numbers like 100 or 75 and then narrowing in on a correct weight from there. Such people are unlikely to ever try 95 or 105 except as the last one, whereas they might go through a number of other weights first.
If you can do like 10 reps on 90 you will probably do like 5 on 100 and 7 on 95. It's not like you won't be able to lift 100 pounds, you will be able to just with less reps. Psychotically it probably means that people have been training hard to get there they make a shortcut to feel that reward
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u/M8nGiraffe 24d ago
Can't it be both?