The fastest way to log a workout is a single text: "bench 135x5x3, row 115x8x3, curls 30x12x2". It takes ten seconds after the session, the data is just as useful as an app's, and you skip the part where you unlock a logging app between every set. The two things you have to give up are a live rest timer and a screen to stare at mid-set; what you gain is a log you will actually keep, because the whole job happens in the messages app you already have open. This guide covers the shorthand, what is worth tracking, and what a coach can do with the numbers once they arrive by text.
Why logging by text sticks
Workout logging fails for the same reason food logging fails: friction at the moment of truth. An app wants you to find the exercise, enter each set, and tap through; that is fine on a quiet day and abandoned on a busy one. A text has one step. The consistency research is consistent on this: the behaviours people keep are the ones that cost almost nothing per repetition. A line of shorthand sent while you walk to the car costs almost nothing.
The second reason is that your log lives where your coach does. If the same thread that holds your sets also holds your meals, your weigh-ins and your check-ins, there is one place to look and one place for a coach, human or AI, to read.
The shorthand
A compact format that any good text coach, and most humans, will read:
| What you did | Type | Meaning |
|---|---|---|
| Three sets of five at 135 | bench 135x5x3 |
weight × reps × sets |
| Sets at different reps | squat 185x5, 185x5, 185x4 |
each set listed |
| A single top set | deadlift 275x3 |
one set |
| Bodyweight | pull-ups 8,7,6 |
reps per set |
| A whole session | lower A done, squat 185x5x3, rdl 155x8x3, leg press 270x12x3 |
one message |
| A run or ride | ran 5k in 27:40 or bike 45 min easy |
distance, time or both |
Units follow whatever you use day to day; a coach that knows you lift in pounds will read "135" as pounds. If a weight is unusual (a new plate, a different bar) say so once and it is remembered.
What is worth tracking
Not everything. For a strength or physique goal, the numbers that predict progress are few: the load and reps on your main lifts, the weekly hard sets per muscle group, bodyweight, waist, and a photo every few weeks. How to track fitness progress covers the six and how to read them. For running, weekly distance and the pace at an easy effort. If you log those, you have everything a coach needs; a second decimal on your rest periods adds nothing.
What a coach does with a texted log
You: bench 135x5x3, row 115x8x3, curls 30x12x2
Bay: logged ✅ all 15 on bench, so next time is 140. 5,505 lb moved today, about 2 Mini Coopers
Logging is only half of it. The value of a log is in what comes back, and this is where text has an advantage over a spreadsheet: you ask a question and get an answer.
With Bay, the loop looks like this. You text the session in shorthand and it is saved against the plan's session, with each set matched to the lift. Milestones show up on the reply the moment they happen: the first time you bench a plate a side, the first bodyweight squat multiple, the first strict pull-up or dip, a first distance or a fastest time on a run. Once a session is past 2,000 lb of tonnage the reply carries a line for that too ("5,625 lb moved today, about 2 Mini Coopers"). Then you can ask:
- "how's my bench" returns the per-session trend for that lift, with the estimated one-rep max moving over time.
- "show me my lifts" returns a card: a sparkline of estimated 1RM for each main lift and your weekly hard sets per muscle group against the band your plan is built around.
- "how's my streak" returns the training streak and what it takes to keep it.
The log also drives tomorrow's prescription. Bay's plans use rule-based progressive overload: hit every prescribed rep and the next session's weight goes up by the increment for that lift; miss twice in a row and it drops ten percent and rebuilds. The morning text on a training day carries the session with the weight to lift, so logging in shorthand today is what sets the numbers tomorrow. Bay is free right now, over iMessage, RCS and SMS.
Text log vs. app log
| Text message | Logging app | |
|---|---|---|
| Time per session | 10–20 seconds, after | Several minutes, during |
| Rest timer | No; use your phone clock | Yes |
| Plate calculator | Not built in | Usually built in |
| Trend charts | On request, sent back as a card | On a stats tab |
| Food, weight and check-ins | Same thread | Separate app |
| Learning curve | None | Each app's own |
| Cost | Bay: free right now | Free tiers to about $100/yr |
If the rest timer and the set-by-set screen matter to you, the honest answer is to use both: a free logger such as Hevy or Strong between sets, and a one-line text afterwards so the coach has the numbers. Plenty of Bay members do exactly that.
Questions, answered.
Tap a question.
How do I log a workout by text?
Send one line per lift in weight × reps × sets form, "bench 135x5x3", or list the sets if they differ, "squat 185x5, 185x5, 185x4". Bodyweight work is reps per set, cardio is distance and time.
Is texting a workout log as accurate as an app?
The data is the same: load, reps and sets per lift. The only thing you lose is per-set timestamps and a built-in rest timer.
Can an AI coach read a texted workout and adjust my plan?
Yes. Bay matches each set to the lift on your plan, applies its progression rule (hit every rep, add weight; miss twice, deload 10 percent) and puts the new weights in the next morning's text.
What should I track for strength progress?
Load and reps on your main lifts, weekly hard sets per muscle group, bodyweight, waist, and a photo every few weeks.
Is Bay free for workout logging?
Yes, right now, with nothing to install: it runs over iMessage, RCS and SMS.
Related reading
Bay is a software assistant, not a doctor, dietitian or certified trainer. Nothing here is medical, nutrition or professional advice; check with a professional before changing your diet or training.