The training log: why memory is not enough as a basis
Without a record it is impossible to say whether a demand has risen. That sounds banal, but it decides whether training becomes plannable or stays a sequence of separate appointments. This text describes what should be recorded, what can safely be left out, and where logs fail in practice.
Why memory does not carry
People recall training performances unreliably, and not at random but in one direction: successful sets stick better than laborious ones, and the last increase feels closer in hindsight than it was.
Then there is the number of variables. A single session with five exercises and three sets each contains around thirty individual figures — weight, repetitions, effort. Over a month that is several hundred. That quantity cannot be held in your head, and nobody should try.
What belongs in it
Three entries per working set suffice for most purposes: the weight, the number of repetitions, and a measure of effort — for instance the estimated number of repetitions that would still have been possible at the end of the set.
The third is left out most often and is the most informative. The same ten repetitions with the same weight mean something entirely different if four more would have been possible one time and none the next. Without that context, two very different sets look identical in the log.
Alongside these come entries recording the conditions: the order of exercises, rest length in broad terms, and for exercises with settings, the settings — seat height, grip width, stance width. These values change rarely but decide whether two entries are comparable at all.
What can be left out
Warm-up sets need not be logged, as long as it is clear which sets count as working sets. More important than recording them is a fixed rule about when a set is counted — otherwise the same number means different things in January and March.
Nor does everything measurable belong in it. A log demanding twelve fields per set will not be kept after two weeks. The question is not what could be recorded, but what would change a decision in the next session.
Free text is worth it in one place: things that cannot otherwise be represented — a bad night, an unusual schedule, a technical cue meant to help next time. Such notes later explain why a week stands out.
Where logs fail
The most common reason is effort during the session. Typing between sets costs concentration and time. More workable is to record weight and repetitions immediately after the set and everything else afterwards.
The second reason is inconsistency in naming. Naming the same exercise one way and then another produces two histories, both incomplete. A fixed list of your own exercises solves that once.
The third reason is that the log is never read. A diary that is only written into is a chore. It becomes useful when, before an exercise, you check what was there last time — and derive today’s target from it.
Paper, spreadsheet or app
The medium is secondary as long as three conditions hold: an entry has to take seconds, the last entry has to be findable next time, and the data must not get lost.
Paper is unbeatably fast and does not survive a lost notebook. A spreadsheet is flexible and can be analysed but demands discipline about structure — a column holding weight one time and total volume the next makes the analysis worthless. An app takes care of the structure and shows the trend but ties you to a format.
Anyone switching should take the old data along. A history starting from zero loses exactly what makes it useful — the comparison with what was possible months ago.
What can be read from it
Over a few weeks a log mainly shows fluctuation. It becomes informative over longer periods, and then at several points at once: does weight rise at the same repetition count and the same reserve? Does the repetition count rise at the same weight? Does the number of completed sessions stay stable?
The third question is underrated. Completing 80 per cent of planned sessions over three months does more for the outcome than a theoretically better plan at 40 per cent. A log makes that rate visible, which otherwise disappears into a feeling.
And it makes stagnation visible. If nothing rises over six weeks, that is information — unpleasant, but the basis for changing one thing rather than everything at once.
The key points
- Memory is not a reliable basis — successful sets stick better than laborious ones.
- Weight, repetitions and a measure of effort suffice for most purposes.
- Effort is left out most often and is the most informative of the three.
- Settings and order decide whether two entries are comparable at all.
- A log with too many fields will not be kept after two weeks.
- It only becomes useful when it is checked before an exercise and today’s target derived from it.
- The proportion of sessions actually completed is an underrated figure.
Last reviewed: 14.08.2026
Created by AI