Solo gym sessions show you what your effort looks like with no one to impress.

Effort is quietly social. When somebody is watching, the last few reps or the last ten minutes get easier to find, and it is hard to tell how much of that came from you. Alone, that borrowed fuel is gone. Whatever you do then is your actual baseline, and the baseline is more useful to know than your best day.

Do one session, one practice, or one study block with no audience and no post about it afterward. Notice where you want to stop and what you do next. The number does not matter, and the point is not to punish yourself, only to see the honest reading.