Tracking strength progress over months

Why the logbook is the primary record

Of everything discussed in this category, your training log is the most informative and the least ambiguous. Weight fluctuates with water. Circumferences carry measurement error. Body-fat estimates have error bars wider than the change you are looking for.

A weight on a bar for a number of reps is a fact. Either you lifted it or you did not.

It also answers the question the other measures cannot: am I keeping my muscle? If you are losing weight and your lifts hold, the weight leaving is overwhelmingly fat. No body-fat scale can tell you that with anything like the same confidence.

What to record

The minimum that makes a log useful:

• Exercise, weight, sets, reps. Non-negotiable.
• How hard the last set felt — reps in reserve, or a 1–10 rating. This is the field that turns numbers into information, because 80 kg × 5 at RIR 3 and 80 kg × 5 at RIR 0 are completely different sessions — see reps in reserve and failure.
• Anything that changed. Different bar, different machine, different foot position, a belt, straps. These change the numbers and are forgotten within a fortnight.
• Rest taken, at least roughly. Three minutes and ninety seconds produce different results on the same weight — see rest between sets versus rest between sessions.
• Context worth knowing later: poor sleep, illness, high stress, a deficit. A bad session with a reason recorded is data; a bad session with no context is confusing.

What not to bother with: exhaustive tempo notation, every warm-up set, or elaborate scoring systems. The best log is the one you actually fill in during a session. MyFitsy shows the weight and reps you used last time on the screen as you train, which is the single feature that makes progression a decision rather than a guess.

Comparing sessions honestly

The main analytical trap is comparing sets that are not comparable.

• Comparing a fresh first exercise to the same exercise done fourth. Order matters enormously.
• Comparing a set at RIR 0 to a set at RIR 3 and concluding you got stronger.
• Comparing across equipment. Different machines, cable stacks and even barbells are not equivalent.
• Comparing a set with a belt to one without.
• Comparing your best-ever single session to a typical one. Your best day is not your baseline.
• Comparing across rep ranges without a common measure. Is 100 kg × 5 better than 90 kg × 10?

For that last one, estimated one-rep max is a useful common currency. A simple form: weight × (1 + reps ÷ 30). So 100 × 5 gives an estimate of about 117 kg, and 90 × 10 gives about 120 kg — so the second set was arguably the better performance. Treat estimates as rough, and only compare them within the same rep range for anything important.

The cleanest comparison remains: same exercise, same position in the session, same rep target, same rest, similar RIR. That is why running a programme for eight to twelve weeks before changing it is analytically useful as well as physiologically sensible.

The right time window

Session-to-session variation is much larger than people expect. Sleep, food, stress, time of day and where you are in the week can swing a working set by 5–10%.

• Session to session: noise. Do not draw conclusions.
• Two to three weeks: emerging signal, still unreliable.
• Four to eight weeks: the right window. Compare this block's working weights to the same point in the previous block.
• Three to six months: the trend that matters. This is where you see whether the programme is working.
• A year: the only honest measure of a training approach.

What progress looks like at different stages

• First six months: weight increases most sessions on most lifts. Fast, and it will not last — see why the first six months matter.
• Six to eighteen months: weekly to fortnightly increases on main lifts. Reps progress before weight.
• Two to four years: monthly progress on main lifts. Total volume and quality become the more visible markers.
• Four years and beyond: annual progress on main lifts, and that is normal rather than a failure. Progress shows up as more volume at the same weight, better technique, or one more rep at the same load.

Which is why the definition of progress has to change as you advance. An experienced lifter who expects the beginner pattern will conclude they are plateaued permanently — see what a plateau actually looks like in the data.

Beyond weight on the bar, other genuine forms of progress: more total sets at the same load, the same weight at higher RIR, better technique on video, more reps before form breaks, and shorter rest needed for the same performance.

Tracking during a deficit

A specific and important case, because the interpretation inverts.

• Holding your lifts is success. Not stagnation. You are lifting the same weight at a lower body weight, which is relatively stronger.
• Expect high-rep work to suffer first. Glycogen depletion affects sets of twelve more than sets of three.
• A small decline late in a long deficit is normal. A consistent multi-week decline means the deficit is too large.
• Your log is the muscle-retention check. Lifts holding while weight falls is the strongest available evidence that you are losing fat rather than muscle — see recovery in a calorie deficit.

Common questions

Do I need to log every set?

Every working set. Warm-ups are optional.

How do I compare different rep ranges?

Estimated one-rep max as a rough common currency: weight × (1 + reps ÷ 30).

Should I test my one-rep max?

Rarely. Estimates from working sets are sufficient and much less fatiguing.

What if my lifts go down?

Check sleep, food, stress and deficit status before changing the programme. Deload first.

How often should I review the log?

Monthly, comparing to eight weeks earlier.

Is a paper notebook fine?

Yes. The advantage of an app is that last session's numbers are in front of you while you train.

My lifts are flat but I look better. Is that progress?

Yes — particularly in a deficit or at maintenance. Progress has more than one form.

The practical version

• Record weight, sets, reps and how hard the last set felt for every working set.
• Note anything that changed — equipment, belt, foot position, rest taken.
• Compare the same exercise across four to eight weeks, not session to session.
• Only compare comparable sets: same position in session, rep target, rest and RIR.
• Expect the pattern of progress to change as you advance — annual gains are normal by year four.
• In a deficit, holding your lifts is success and the best muscle-retention evidence you have.