Tracking

What to write down in a gym log, and what to leave out

A training log is not a diary. Its only job is to answer questions you will ask later: am I getting stronger, did that change help, why did this lift stall. Anything that does not help answer a question like that is clutter, and anything missing that would have answered one is a gap you will discover months too late.

Judged that way, most logs record too much of the wrong thing and too little of one thing that matters.

What earns a place

The exercise, precisely. Not "bench" but barbell bench, dumbbell bench, or the specific machine. Numbers from different equipment are not comparable, and a log that blurs them will produce comparisons that mean nothing.

Weight and reps for each working set. The obvious part, and the part everyone already does.

Reps in reserve. This is the one most logs are missing, and it is the one that matters most once you are past the beginner stage. At a fixed weight, eight reps with two left and eight reps at failure are different sessions. The first is roughly ten reps of capacity and the second is eight. Without an effort figure your log shows a flat line across a real improvement, or worse, shows progress where there was none.

Which sets were warm-ups. A warm-up recorded as a working set inflates your weekly volume and, if it is your first set, becomes the baseline your progress is measured against. Label them. You can do as many as you like as long as the log knows which they were.

Which side, for one-arm and one-leg work. Logging a single number for two limbs averages away the weaker side, which is often the thing you did unilateral work to find.

Deliberate changes, on the day. A planned lighter week, a technique reset, a new gym, a new rep range. Each of these changes what later comparisons mean, and each is invisible in the numbers unless you record why the numbers moved. A deliberate drop and an unexplained one look identical six weeks later.

What is optional

Rest times. Useful if you are curious, but the drop-off between consecutive sets already measures what rest time is a proxy for. A drop of one rep is normal; three or more means you did not rest enough. Your sets record that without a stopwatch.

Short notes about specific events. Pain, illness, a terrible night of sleep, training fasted for once. Short, factual, and only when something unusual happened.

What is mostly clutter

Long descriptions of how a session felt. They are satisfying to write and rarely read. How a session feels is dominated by day-to-day noise, so paragraphs of it seldom change a conclusion.

Total tonnage as your main number. Weight times reps times sets rewards doing more sets and more reps whether or not you got stronger. It is easy to raise tonnage while getting weaker.

Every metric a wearable offers. Heart rate traces and daily readiness scores move for many reasons unrelated to training. Collecting them is harmless; building training decisions on them is where the trouble starts.

The test for anything else

Before adding a field to your log, ask what conclusion it could change. If you cannot name a decision it would alter, you will not look at it again, and it is costing you effort at the end of every set for nothing.

If you can name one, record it consistently. A number logged half the time is barely better than a number never logged, because the comparisons it was meant to support fall apart on the sessions where it is missing.

Common questions

What should I write in my workout log?

For each working set: the exercise, the weight, the reps, and how many reps you had left in reserve. Mark warm-ups as warm-ups. Note deliberate changes, like a planned lighter week or a switch of equipment, when they happen.

Do I need to record reps in reserve?

If you want to know whether you progressed at a fixed weight, yes. Without it, eight reps with two to spare and eight reps at failure look identical, and those are genuinely different sessions.

Should I track rest times?

It is optional. The drop-off in reps between consecutive sets already tells you whether you rested enough, so a stopwatch adds less than you might expect.

Is it worth writing notes about how a session felt?

Briefly, if something specific happened, such as pain, illness or a very poor night of sleep. Long subjective notes are rarely read again and rarely change a decision.