The most useful training question is also the one most people get backwards: not which split to run, but how many hard sets each muscle gets in a week. Ten honest sets for chest, twice a week, will outgrow twenty sloppy ones piled into a single session. This guide covers the evidence-based range, how to count a set, how to split the work across days, and how to tell when you have done enough.
The range that actually matters#
For most lifters, hypertrophy lands in 10–20 hard sets per muscle per week. Below about 8–10, you are closer to maintenance than growth. Past about 20, extra sets start costing more recovery than they return — that is junk volume, not a work ethic. The range is wide on purpose: a beginner grows on the low end, an intermediate usually lives in the middle, and only well-recovered advanced lifters justify the top.
| Training age | Hard sets / muscle / week | Why |
|---|---|---|
| Beginner (0–12 months) | 8–12 | New stimulus is enough. Practice the lifts; do not bury yourself. |
| Intermediate | 10–18 | The default. Split across two sessions so every set is still quality. |
| Advanced | 16–22 | Only if sleep, food, and the last mesocycle already recovered cleanly. |
Those numbers are per muscle, not per session. Ten sets of bench on Monday and nothing for chest until next Monday is not the same stimulus as five on Monday and five on Thursday. Muscle protein synthesis after a session is elevated for roughly 48–72 hours; train a muscle once a week and it spends most of the week doing nothing. Two sessions is the practical default. Check the weekly total with the training volume calculator rather than guessing from how tired the workout felt.
What counts as a hard set#
A hard set is a working set taken within about 1–3 reps of failure — RPE 7–9, or 1–3 RIR. Warm-up sets do not count. A set you could have doubled is not a hard set. A set you ground into a messy 12 because the program said 12 is not better than a clean 9 that you could not have repeated.
Compounds credit the muscles they actually load. A set of barbell bench is a chest set and a triceps set. A set of squats is quads, glutes, and enough spinal erector work that you should not also pile five extra lower-back isolation sets on the same day. Count honestly: if the muscle was a prime mover, the set counts; if it was just along for the ride, it does not.
How to split the week#
Take the weekly target and divide it by how often you train that muscle. Ten to sixteen hard sets, twice a week, is 5–8 working sets per session — enough to accumulate, short enough that the last set is still a real set. That is why a four-day upper/lower split or a push pull legs rotation is easier to recover from than a once-a-week body-part day with 20 sets of chest.
- Smaller muscles (biceps, side delts, calves, rear delts) sit at the low end and tolerate higher frequency. Six to twelve hard sets, two or three times a week, is plenty.
- Larger muscles (quads, back, chest) sit in the middle of the range and need more recovery between sessions. Ten to sixteen hard sets across two days is the usual recipe.
- A lagging muscle gets the top of the range first — not a fifth training day. Add two to four hard sets to an existing session before you add a day.
Gript's muscle balance view makes the distribution visible: if chest is at 18 hard sets and back is at 8, the problem is not a mysterious lag, it is the log.
When more sets stop helping#
Volume is a lever, not a personality. Add sets only after the current ones are already progressive — more load or more reps than last month, on the same exercises, taken hard. If the numbers are stuck, adding a fifth flye variation is how a plateau gets a longer to-do list. Drop back toward 10–12 hard sets, keep them honest, and read the gym plateau guide before you inflate the program.
Signs you are already over the useful range: performance on the first compound of the session is going backwards week to week, sleep is worse, and the last three isolation exercises exist because they were in a screenshot. Cut those last three. Log the rest. The weekly total will look smaller and the next month will usually look stronger.
A practical starting point#
If you do not already have a number, start here and hold it for four to six weeks: 12 hard sets per large muscle, twice a week, 8 hard sets for arms and side delts. Put those sets on a split you will actually complete — three full-body days, four upper/lower days, or six PPL days all work if the weekly total is the same. Then add two sets to a muscle that is recovering well, or subtract two from one that is not. The log tells you which is which; the progressive overload guide covers how the sets themselves should climb.
Create the days as routines in Gript — here is how — and every working set you log is a set you can count. That is the entire method: pick a weekly number, take the sets hard, and let the log decide whether next month needs more work or better work.