How to track workouts: log five things, then beat them next time
Most people who try to track workouts quit within a few weeks. The usual reason is not laziness. They tried to record too much, so the log became a second job.
This guide keeps it small. You will learn the few numbers that matter, a format you can copy into a notebook, a spreadsheet or an app, and one rule that turns your log into a plan for the next session.
It is general fitness information, not medical advice. If you have a medical condition, are pregnant, have an injury, or feel pain when you move, talk to a doctor or physical therapist before you start.
Why tracking is worth the effort
Without a log, every session starts from memory. You guess the weight, you guess the reps, and you drift toward whatever feels comfortable. With a log, you walk in knowing exactly what to beat.
There is research behind the habit. A 2009 meta-analysis of 122 evaluations of healthy eating and physical activity interventions (44,747 people) found that self-monitoring explained the most variation between studies. Interventions that paired self-monitoring with at least one other control-theory technique were more effective than the rest, with a pooled effect size of 0.42 against 0.26 (Michie and colleagues, 2009).
That study covers behavior change in general, not lifting logs in particular, and it does not promise any result for you. It does support the simple idea behind this page: writing down what you do helps you keep doing it.
What to log, and what to skip
Start with the first five rows. Add the others only if you will use them. If a number never changes a decision, stop recording it.
| What to log | Why it matters | Log it? |
|---|---|---|
| Exercise name | You can only compare like with like. Use the same name every time. | Always |
| Weight | This is the number you will try to raise. | Always |
| Reps per set | Reps tell you when it is time to add weight. | Always |
| Number of sets | Shows whether you did the full plan. | Always |
| Short note | Records why a session was off, such as poor sleep or a sore shoulder. | When it matters |
| Rest time between sets | Useful if you notice you are rushing or drifting. Otherwise a timer is enough. | Optional |
| Effort (reps left in reserve) | A quick 1 to 3 score shows whether the weight was right. | Optional |
| Body weight | Helpful context if you also care about your weight. It says little about strength. | Optional |
| Calories burned | Estimates from watches and machines are rough, and they do not tell you what to lift next. | Skip |
A format you can copy
Keep one line per exercise. Write the weight first, then the reps for each set. A notebook, a notes app or a spreadsheet all work.
- Write the date and the workout name at the top, for example "Mon 12 Oct, Workout A".
- Before each exercise, read your last line for it. That is your target for today.
- Log each set when you finish it. For example: "Goblet squat, 40 lb: 12, 11, 10".
- Add a short note only if something was off, such as "slept 5 hours" or "left knee tight".
- Scan the page before you leave. Mark any exercise where you hit the top of the rep range on every set. That one goes up next time.
The whole thing should add about a minute to a workout. If it takes longer, you are logging too much.
Use the log: the one rule that picks your next weight
A log you never read is just a diary. Give it a job. Pick a rep range, such as 8 to 12 reps. Stay at the same weight until you reach the top of the range on every set. Then go up to the next weight and build the reps back up.
This follows the guidance of the American College of Sports Medicine. For people new to resistance training it recommends loads in the 8 to 12 repetition range, and a load increase of about 2 to 10% when you can do 1 to 2 reps more than the target (ACSM position stand, 2009). With dumbbells you cannot always take a small step, so use the next weight up.
| Session | What you logged | What to do next time |
|---|---|---|
| 1 | 40 lb: 10, 9, 8 | Stay at 40 lb. Try for one more rep on each set. |
| 2 | 40 lb: 11, 10, 9 | Stay at 40 lb. |
| 3 | 40 lb: 12, 12, 12 | Top of the range on every set. Go up to the next weight. |
| 4 | 45 lb: 9, 8, 8 | Normal. Reps drop when the weight rises. Build back up. |
A bad session is data, not failure. Sleep, stress and illness all change what you can lift. Write a note and carry on. One low number does not erase your trend.
Notebook, spreadsheet or app?
The best tool is the one you will open every session. All three work, and each has a clear cost.
| Method | Good at | Weak at |
|---|---|---|
| Notebook | Free, fast to start, no battery or signal needed. | Hard to search. You flip back through pages to find last time. |
| Spreadsheet | Free, easy to sort and chart. | Slow to type on a phone between sets. |
| Workout app | Shows your last numbers next to the set you are doing, so you do not look anything up. | You depend on the app. Check that you can export your data. |
If you try an app, the feature that matters most is seeing your previous weight and reps while you log the current set. Everything else is extra. Forge is a free workout tracker built around that: it shows what you lifted last time before every set.
Common tracking mistakes
- Logging too much. Ten metrics per set is how people quit. Stay with the five.
- Logging later. Numbers written an hour after the workout are rounded up from memory. Log each set as you finish it.
- Changing exercise names. "Bench" one week and "dumbbell press" the next breaks the comparison. Pick one name per exercise.
- Never reading the log. Check your last numbers before every exercise, not just at the end of the month.
- Chasing the number at any cost. Do not add weight if your form breaks down. Matching last time with better form is still progress.
Want a log that shows last time before every set?
Forge is a free workout tracker. It shows what you lifted last time before every set, so you always know what to beat. Forge also adds plans that adapt to what you actually lift. It is free.
Start logging freeFrequently asked questions
What should I track in my workouts?
Track the exercise name, the weight, the reps for each set and the number of sets. Add a short note when something affected the session, such as poor sleep or a sore joint. Rest times, effort scores and body weight are optional extras.
How do I log a workout?
Write the date and workout name, then one line per exercise with the weight and the reps for each set, for example 40 lb: 12, 11, 10. Log each set as you finish it. Before each exercise, read your last line for it so you know what to beat.
Should I use an app or a notebook to track workouts?
Use whichever you will open every session. A notebook is free and fast. A spreadsheet is easy to sort. An app shows your previous numbers next to the set you are doing, which saves you from looking them up.
How do I know when to add weight?
Pick a rep range, such as 8 to 12. When you reach the top of the range on every set at the same weight, move to the next weight up. The ACSM suggests a load increase of about 2 to 10% when you can do 1 to 2 more reps than your target.
How long should logging a workout take?
About one minute added to the whole session. If it takes much longer, you are recording more than you will use. Cut back to the exercise, weight, reps and sets.
What if I miss a workout or have a bad session?
Write a short note and carry on with the next planned workout. One missed or weak session does not erase your trend. Compare your last few sessions, not a single day.
Keep reading
Sources
- Michie S, et al. Effective techniques in healthy eating and physical activity interventions: a meta-regression (Health Psychology, 2009)
- American College of Sports Medicine position stand: Progression models in resistance training for healthy adults (2009)
Written by the Forge team from the public guidelines above. This guide is general fitness information. Not medical advice. Talk to a doctor before you start an exercise program if you have a health condition, are pregnant or have an injury.