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Volume
This is the single most useful number in a training programme, and almost nobody can tell you theirs without counting it up on the back of an envelope.
10–20 hard sets per muscle per week is the range with the best evidence behind it. Below about 5 sets, growth is clearly worse; above roughly 20, returns diminish and in some studies reverse. Start at 10–12 and add only when you are recovering well.
Meta-analyses of resistance training consistently find a dose–response relationship: people doing 10 or more sets per muscle per week grow more than those doing fewer than 5, with the steepest part of the curve between about 5 and 10. Past roughly 20 sets the curve flattens, and several controlled trials show worse outcomes at very high volumes — plausibly because accumulated fatigue degrades the quality of every set.
| Weekly sets per muscle | What it does | Who it suits |
|---|---|---|
| Under 5 | Minimal growth stimulus | Nobody, if growth is the goal |
| 5–9 | Real growth; maintains well | Busy weeks, deloads, beginners |
| 10–20 | The productive range | Most people, most of the time |
| 20+ | Diminishing, sometimes negative | Advanced, short blocks, good recovery only |
A set counts if it was taken within about three reps of failure. Warm-ups do not count. Neither does the set you cut short because the gym was closing.
Partial credit for indirect work is the bit people get wrong. A rough convention that works:
Count it honestly once and most people discover two things: their chest is on 22 sets and their hamstrings are on 4.
There is good evidence for a limit of roughly 6–8 hard sets per muscle in a single session. Beyond that, the extra sets contribute progressively less — you are fatigued, the load drops, and the quality falls.
This is the practical argument for frequency. If you want 16 sets of chest a week, two sessions of 8 will do more than one session of 16. That is the whole reason training a muscle twice a week outperforms once.
| Muscle | Session A | Session B | Weekly total |
|---|---|---|---|
| Chest | 4 (bench) + 3 (incline DB) | 3 (dip) + 3 (cable fly) | 13 |
| Back | 4 (row) + 3 (pulldown) | 4 (pull-up) + 3 (cable row) | 14 |
| Quads | 4 (squat) + 3 (leg press) | 3 (hack squat) + 2 (extension) | 12 |
| Hamstrings | 3 (RDL) | 3 (leg curl) + 3 (RDL) | 9 + 2.5 indirect |
| Side delts | 3 (lateral raise) | 3 (cable lateral) | 6 — add more |
Side delts and hamstrings are the two most commonly under-served muscle groups in self-written programmes, because both are mostly missed by the big compound lifts people build their week around.
Add 2–3 sets per muscle per week at a time, then hold for a fortnight and see what happens to performance. Add more only if the extra sets are still being performed well. If sleep is poor, you are in a steep deficit, or sessions are already 90 minutes, the answer to a plateau is almost never more sets — try a deload first.
And remember that volume has to be recovered from. The same 18 sets produce growth in a small surplus with 8 hours of sleep, and produce a plateau in a deficit with 6.
Between 10 and 20 hard sets per muscle group per week suits most people. Research shows clearly better growth at 10 or more sets than below 5, with the steepest gains between about 5 and 10 sets, and diminishing or negative returns beyond roughly 20.
It is the upper end of the useful range rather than automatically too much. Some advanced lifters with good recovery benefit from it in short blocks, but several studies show reduced growth at very high volumes as fatigue degrades the quality of each set.
Count any set taken within about three reps of failure. Give full credit to direct work and roughly half credit to indirect work: a bench press counts as one chest set plus half a set each for triceps and front delts, a row counts as one back set plus half a biceps set.
No. Around 6 to 8 hard sets per muscle in a single session appears to be the point where extra sets stop contributing much. Splitting weekly volume across two or three sessions produces better results than concentrating it in one.
Almost nobody knows their real weekly set count, because counting it by hand across four sessions is tedious. NutriMacro totals sets per muscle group automatically from what you logged, which is usually how people discover their hamstrings have been on four sets a week for a year.
NutriMacro is a nutrition and training tracker for iPhone and Android. It logs food by barcode, photo or search, counts food in slices and units rather than grams, and keeps strength training, GPS activities, sleep and recovery in the same daily view. It runs in the language of your phone across 108 countries.
General training guidance for healthy adults. If you have an injury, a health condition or are new to lifting, get coaching on technique before chasing load.
Read next: Training frequency Exercises per muscle group Progressive overload
