Memory is Unreliable
Human memory is notoriously bad at tracking slow, gradual changes. If you change by 0.1% a day, you will never notice it in the mirror. You typically only notice "step functions" like a visible change in waist definition or muscle fullness. This is why people often quit self-improvement: they are improving, but they can't see it.
Objective tracking—standardized logs, photos, and measurements—bridges this blind spot. It proves to your brain that the work is paying off.
The Variable Problem
Most people's progress photos are useless because they change too many variables. Different lighting, different angle, different time of day.
To track scientifically, you must act like a scientist. Control your variables:
- Same location (bathroom mirror is usually consistent).
- Same lighting source (artificial light is more consistent than window light).
- Same time of day (morning is best to avoid food/water bloat variables).
- Same camera lens distance.