How to Log Workouts: Sets, Reps, and Weight Explained

You know that guy who says he tracks his workouts but actually scribbles numbers on the drive home? I've been him. A weight here, a rep count there, filled in from memory while you're walking to the car. One bad session won't kill your progress - but six weeks of fuzzy logging will quietly kill the whole point of tracking: knowing whether you're actually getting stronger.

Here's the version that actually works.

1. Log immediately, not from memory

Phone in hand between sets, not buried in your gym bag. Record the set the moment you rack the bar - not between exercises, not after you've showered.

What goes wrong: Memory rounds numbers up. You swear you hit 135 for 8, but it was really 6 clean reps and 2 that needed a hip drive cheat. Log that inflated number six times and your "progress" is measuring your optimism, not your training.

2. Record weight and reps for every set - not just the best one

Three sets of squats at different weights? That's three entries. Not one "did squats" line with your top set stapled to it.

What goes wrong: Only logging your best set hides fatigue. First set: 185×8. Third set: 185×4. That's useful data about recovery and volume tolerance - data you throw away when only the top set makes it into the log.

3. Keep warmup sets mentally separate from working sets

Some paid trackers let you flag a set as warmup so it doesn't muddy your volume or PR numbers. Plenty of free loggers - Stay Fit included - don't have that tag yet and just log every set the same way. That's fine. Just know which sets were warmups when you're reading your history back.

What goes wrong: Treating a warmup set like a working set inflates that day's volume in your head. A light 95-lb squat set starts looking like a real top set when you glance at history a week later, and suddenly you're making load decisions based on numbers that weren't even the work.

4. Note effort, not just numbers

"135×8" tells you what happened. "135×8, last rep was a grind" tells you what to do next week. A quick mental tag - easy, moderate, hard - turns a flat number into something actionable. Some trackers have built-in RPE fields; Stay Fit doesn't yet, so a short note on the completion screen or a line in your head works fine.

What goes wrong: Two sets that look identical on paper felt completely different. Without any effort context, you can't tell whether to add weight or hold steady - the log has the numbers but not the story behind them.

5. Check your previous session before you start

Before you load the bar, glance at what you did last time on this exercise. Apps like Iron Log surface "ghost sets" during logging so you don't have to dig through history mid-workout. Stay Fit shows a previous-session hint while you're logging, and the routine editor's smart-suggestion banner goes a step further - if you did 80kg × 8 last time, it proposes 82.5kg × 8 today instead of just replaying the old number and leaving you to guess.

What goes wrong: Training without a reference point means guessing at load every session. Guess too low and you stall. Guess too high and you're grinding reps you haven't earned yet. The whole point of logging is to remove that guesswork.

6. Review weekly, not daily

Check your reports - streaks, frequency, time trained - once a week, not after every session. Daily checking catches noise (bad sleep, rushed lunch break session). Weekly checking catches trends.

What goes wrong: One missed rep count on a Tuesday and you're dropping weight by Thursday. That's normal variance getting treated like a real regression - and it slows progress more than the bad session ever did.

The minimum viable log

If you do nothing else: exercise name, weight, reps, every set, logged immediately. That alone is enough to support progressive overload and catch a stall before it becomes a pattern. Everything past that - effort notes, body measurements, progress photos - adds precision. But those four basics are what make the log usable at all.