Specialisation: prioritise one muscle without wrecking the rest
Specialising is not adding sets to the muscle you want. It is taking them from somewhere else. Anyone who only adds is not specialising — they are raising total volume, and they meet their recovery limit halfway through the block.
1.Specialising is subtraction, not addition
The amount of work you recover from in a week is not infinite, and it does not change because you decided this month is back month. If back goes from twelve to eighteen sets and everything else stays as it was, what you did was put six more sets on top of a week that was already full. The first weeks seem to go fine; it is the fourth that tells the truth.
A real specialisation has two halves and the second is the one people forget: raise the priority muscle and lower the others, in the same block, deliberately. The week’s total ends up close to what it was. What changes is where it goes.
2.Where to take it from, and how much
Take it from what is not the priority and from what is already at or above target. Maintaining costs less than growing — that is the principle any specialisation rests on — so a muscle dropped to the bottom of its range for six weeks does not disappear; it waits. Dropping to zero is a different thing, and almost always a bad trade: you lose more than the transferred sets gain.
In practice: pick one priority, two at most. Raise it by four to six sets a week and drop two or three other groups to the bottom of their range. If you are raising three muscles and lowering none, go back to the previous paragraph — that is not a specialisation block, it is a heavier block with another name.
3.What the panel counts — and what it does not, unless you say so
Volume targets in NoteFit are per week, not per athlete: every microcycle carries its own target for each muscle group. That is exactly the shape a specialisation needs — you raise the back target and lower the chest target across the block’s weeks, and the panel starts telling you whether the week you built does what you decided, instead of leaving you to trust your memory.
There is something worth knowing before you read that number, because it changes the whole reading. A set counts in full towards the exercise’s primary AND secondary muscle — but only if the secondary is marked. The catalogue ships a secondary muscle on just 89 of its 1,433 exercises, which means that by default almost all of your indirect volume is invisible. Mark the bench press as chest + triceps and those four sets count in both; leave it unmarked and your triceps read zero in a week where they did plenty of work.
For a specialisation this matters in both directions. Marking properly shows you that the muscle you dropped is still getting indirect work — and sometimes shows it was getting so much that you did not need to cut it at all.

4.How long it lasts
One block. Four to six weeks plus the deload, like any other. What makes a specialisation a specialisation is that it is temporary: if back is the priority forever, that is not a specialisation block, it is your normal programme, and everything else shrinks slowly with nobody noticing.
At the end of the block there is a decision to make on purpose rather than by drift: return to the previous balance, or run another block with the same priority. Both are legitimate. What is not legitimate is reaching March without knowing how long chest has been sitting at the bottom of its range.
5.The three usual mistakes
The first is specialising in everything. If the priority list has four muscles there are no priorities — there is a wish to grow quickly, which is a different thing. Choosing costs something, and that cost is what makes the method work.
The second is assuming more sets pay off in a straight line. The relationship between volume and growth has diminishing returns: the first sets you add return more than the last, and past a point the last ones cost more than they give. Going from twelve to eighteen is not fifty per cent more result.
The third is changing nothing else. If you put six more sets into back and keep the same number of days, the same session length and the same sleep, something gives — usually the quality of the last sets of the day, which are precisely the ones you added.
Tools
Open the calculatorWeekly volume calculator: sets per muscle group
Pick the week’s exercises, set the sets and see how many sets each muscle receives — no account needed.
References
Work consulted for the ranges and definitions on this page. Where the honest answer is a range, it is the range these works support — not an exact number.
- Schoenfeld BJ, Ogborn D, Krieger JW (2017). Dose-response relationship between weekly resistance training volume and increases in muscle mass: a systematic review and meta-analysis. Journal of Sports Sciences, 35(11), 1073–1082. doi:10.1080/02640414.2016.1210197
A meta-analysis that found more growth with more weekly sets, with diminishing returns. This is where the idea of a range comes from, rather than a right number.
Guides
How many sets per muscle per week
The most cited range is 10 to 20 effective sets per muscle per week. Where to start, how to climb inside a block, and what actually counts as a set.
Read the guideHow to progress load and volume in the same block
Raising both every week is the mistake that brings fatigue before the block ends. Three ways that work, how to write them into a week, and when to stop.
Read the guideFrequently asked questions
Can I specialise on two muscles at once?
You can, if they are small or trained together — biceps and triceps, say. Two large groups at once rarely works out: the total you would have to take from the others becomes too big to take without dropping them below maintenance.
Will the muscle I lowered shrink?
Over a four-to-six-week block, sitting at the bottom of its range and receiving indirect work, it is unlikely. The risk appears when "one block" turns into six months with nobody noticing, which is why the block has an end date written before it starts.
How do I know the specialisation is working?
By the usual signal: on the priority exercise, at the same distance from failure, more load or more reps across the weeks. Size is measured in months; what you measure inside the block is progression.
Do I have to mark the secondary muscle on every exercise?
It is not compulsory, but until you do, the panel undercounts. It is worth doing at least on the exercises you repeat every week — it is once per exercise and it then holds for every block after.
What if I just want to add without taking anything away?
You can, and sometimes that is the right call — especially coming from low volume. But then you are raising total volume, not specialising, and the deload will be needed more, and sooner. It is worth knowing which of the two you are doing.