How to Keep a Training Logbook: Track Weights, Reps and RIR to Keep Progressing

If you have ever wondered how to track workouts in a logbook without turning the gym into an office job, the short answer is one line per exercise: the setup, the working weight, the reps for each set, and how many reps you had left (RIR). Write it straight after the set, and read last week’s line before you start the next one.

That is the whole system. The rest of this guide covers why it works, what each field is for, whether an app or a notebook is better, and how to use the numbers so they actually change what you lift. It sits inside our wider guide to body composition, muscle memory and adherence, because a logbook is mostly an adherence tool.

Why training by feel keeps people stuck

Picture a lifter who trains hard for years, feels tired after every session, and uses roughly the same dumbbells they used two years ago. Nothing is “wrong”. They just never wrote anything down, so every Monday is a fresh guess.

Muscle needs a reason to adapt, and the usual reason is a gradually increasing challenge. The ACSM position stand on progression in resistance training says progressive protocols are necessary to keep stimulating adaptation (ACSM, 2009). You cannot reliably increase a challenge you cannot remember. Memory is especially bad at the details that matter: was it 22 kg for 8, or 20 kg for 10?

A logbook removes the guessing. It does not make you stronger by itself. It makes the target visible. If you want the full theory of how to build progression across months, our progressive overload, deloads and plateaus guide covers it. This article is about the practical tracking side.

Does tracking workouts actually work?

Honest answer: the direct evidence for lifting logbooks is thin, and the best evidence comes from the wider behaviour change literature.

A meta-regression of 122 evaluations (N = 44,747) of physical activity and healthy eating interventions found an overall pooled effect size of 0.31. Among the 26 behaviour change techniques coded, self-monitoring explained the greatest amount of the differences between studies (13%). Interventions that combined self-monitoring with at least one other control theory technique were more effective than the rest (0.42 vs 0.26) (Michie et al., 2009).

In plain words: writing things down helped most when it was paired with something like goal setting or comparing against a goal. That fits the logbook idea, because last week’s numbers are your goal.

Two more pieces, with caveats. A meta-analysis of four randomized trials in 269 patients with cardiovascular disease found self-monitoring increased daily steps (Kanejima et al., 2019). That is walking in cardiac patients, not lifting in gym-goers. And a systematic review found physical activity interventions that provided feedback were more effective than those without it (d = 0.73, wide 95% CI 0.09 to 1.37), though the authors noted brief interventions and high risk of bias in many studies (Krukowski et al., 2024).

What to record in a workout journal

Keep the mandatory list short. The more fields you add, the more likely you are to quit by February.

1. Exercise and setup. For free weights, the name and bench angle. For machines, the seat height, pad position or pin setting. Machine setup changes the mechanics and range of motion, so a “heavier” week may just be a different seat. If you struggle to find the right setting for your body, see our guide on adapting range of motion to your anthropometry.

2. Warm-up. One brief note, such as “2 light sets”. You are not trying to beat warm-ups.

3. Working weight and reps for every set. Write 40 x 10, 10, 9 rather than only “40 kg x 10”. The drop from 10 to 9 tells you something. For bodyweight lifts, log added load or the exact rep count.

4. RIR. Reps in reserve is how many more good reps you could have done. Without effort, the numbers are hard to interpret: 40 kg x 10 as a comfortable set and 40 kg x 10 as a grinder are not the same performance. Our RIR and RPE scale guide explains the scale in more detail, and you can convert between scales with the free RIR and RPE calculator.

5. One short note. Poor sleep, shoulder twinge, slower tempo, hot gym, skipped breakfast. Three words is plenty.

How accurate is your RIR guess?

Fair question, since RIR is a judgement call. In 24 resistance-trained men and women doing bench press at 75% of 1RM, predictions of 1 and 3 RIR were fairly accurate (mean absolute error 0.65 reps), with a slight tendency to underpredict how many reps remained (Refalo et al., 2024). A separate study of 58 trained and untrained adults on machine-based single-joint exercises found predictions were more accurate closer to failure and in later sets (Remmert et al., 2023).

So treat RIR as a useful estimate, not a measurement. Be a bit cautious on the first set of an exercise and when you are far from failure. For a deeper look, see how accurately lifters gauge RIR.

What you can skip

Calories burned, “feel” scores out of ten for every set, and long essays. If you want volume numbers later, you can count hard sets per muscle from your log, as covered in hard sets vs tonnage.

Gym logbook vs fitness app: which is better?

I could not find trial evidence that one format produces more strength than the other. So the useful question is friction: which one will you open at set two when you are tired and your hands are chalky?

	Paper notebook	Phone app	Spreadsheet
Shows last session automatically	No, you flip back	Usually yes	Yes if you keep one row per lift
Speed of entry	Fast, but handwriting	Fast after setup	Slower on a small screen
Distractions	None	Notifications, phone checking	Some
Charts and trends	Manual	Built in	DIY
Cost	A few rupees	Free to paid	Free
Battery or Wi-Fi needed	No	Battery, sometimes signal	Battery

My own rule of thumb: if you check your phone between sets anyway, an app costs you nothing extra. If your phone eats ten minutes every time you unlock it, use a notebook. Either way, keep it in the same place, a gym bag pocket or a pinned note, so starting is automatic.

How to use your logbook before every set

Writing numbers down is half the job. The other half is reading them. This is the “control theory” part that appeared to make self-monitoring work better in the Michie review.

Before each exercise, look at last session’s line and decide on exactly one target:

• If you hit the top of your rep range on all working sets with reps in reserve, add a small amount of load and restart at the bottom of the range.
• If not, keep the same weight and try to add one rep on at least one set.
• If your note says you were sick, tired or in pain last time, repeating the same numbers is a reasonable target.

This is double progression. The ACSM position stand recommends a 2-10% load increase when you can perform the current workload one to two reps over the desired number (ACSM, 2009). The exact percentage matters less than having a rule that you can apply without thinking.

Progress is not only more weight

A common mistake is treating the plate as the only scoreboard. In a within-subject trial, 39 previously untrained young adults trained one leg with load progression and the other with repetition progression for 10 weeks. Leg extension strength and quadriceps size increased in both, with no difference between methods (Chaves et al., 2024). That was early-stage training in untrained people, so I would not assume the same holds for advanced lifters. The takeaway is more modest: adding reps is real progress too, and a logbook captures it.

There is also evidence that muscle growth can occur across a wide range of loading zones rather than one magic rep range (Schoenfeld et al., 2021). That is a narrative review proposing a new framework, so treat it as an argument, not a verdict. Practically, pick a range you can train hard in, and keep it stable long enough for the log to show a trend. Our guide to progressive overload on machines vs free weights shows how this plays out on different equipment.

When the numbers go down

Sometimes the log shows a drop. That is not failure, it is information. Look at the note column first. Short sleep, a heavy week at work, exams, a hot gym in May, or a skipped meal can all show up in a set.

One flat or lower session means very little. Three or more flat sessions on the same lift, with decent sleep and food, is the point to review your programme. Our systematic guide to troubleshooting lifting plateaus walks through that process.

If pain, dizziness, chest discomfort or an injury shows up in your notes repeatedly, that is a reason to see a doctor or physiotherapist, not just to adjust your numbers. A logbook cannot diagnose anything.

A simple 10-minute setup

1. Pick a format today: notebook, app or spreadsheet. Do not research apps for a week.
2. Write your current main lifts and last known working weights from memory. Mark them “estimate”.
3. Next session, record every working set for every exercise. It will feel slow for two weeks, then automatic.
4. Add your first target before each lift using the double progression rule above.
5. Every four to six weeks, flip back through and circle the lifts that have not moved.

If you want a structured plan to log inside, our free push day, pull day and leg day templates give you a fixed exercise list so your log stays consistent. For keeping the habit going when motivation drops, see the behavioural science of gym habits.