Logging a session properly (and what the numbers tell you later)

A training log is only useful if you can trust it three months from now. Here's how to log fast without losing the parts that matter.

Log these four things

1. 1Load — the weight, or the band, or the incline
2. 2Reps — what you actually completed, not what was written
3. 3Effort — the one-tap RPE rating
4. 4Anything that hurt — flag it on the movement, not in a note you'll never find

Everything else is optional. Rest times, tempo notes and comments are useful occasionally and unnecessary most of the time.

Log during, not after

Logging between sets takes four seconds and is accurate. Logging from memory after dinner takes longer and is wrong. If you only change one habit, change this one.

What clean logs give you later

Real personal records PRs are detected automatically across rep ranges, so a six-rep best counts as much as a single. You stop arguing with your own memory.

Honest volume trends You can see whether the month you felt terrible was actually a month you trained 30% less. Usually it was.

Pain patterns Flagged movements build a picture. Three shoulder flags in six weeks on the same pattern is a signal you'd never spot in a notebook.

Better next weeks Every progression decision described in RPE and adaptive progression is built from these fields. Garbage in, generic plan out.

Common logging mistakes

• Logging the plan instead of the performance. If it said 8 and you got 6, log 6.
• Skipping warm-up sets you actually loaded. They matter for fatigue tracking on heavy days.
• Rating everything a 9. See the honesty section in the RPE article.
• Editing history to look better. The only person you're fooling is the version of you who needs the data in October.

Your log is not a scoreboard. It's the instrument panel. Instruments only help if they're telling the truth.

Reviewing without obsessing

Once a week, glance at the summary: sessions completed, total volume, PRs, flags. Two minutes. Then close it. The deep read happens at the end of the block — see 12-week blocks and block reviews.