A set is direct or indirect for a particular muscle
In these examples, bench presses count directly for the chest and indirectly for the triceps, which extend the elbow. Rows count directly for the back and indirectly for the biceps. Curls and triceps extensions count directly for their respective arm muscles.
This is a simplified planning classification. Grip, technique and exercise selection can change how the work is distributed. A set can matter to several muscles without becoming several actual sets in your workout log. Record the exercise once, then examine its contribution when you review the plan.
The rule used here: direct plus half of indirect sets
We report direct sets D, indirect sets I and the model D + 0.5 × I. A recent meta-regression supports fractional counting as a useful analysis model. A half-set is not a measured biological conversion rate for your body.
Count working sets only and keep the classification consistent. Each example repeats its complete session on Monday and Thursday. The tables calculate upper-body work. Two sets of leg presses and two sets of leg curls are also included on each training day.
Week A: full body without separate arm exercises
On both days, perform leg presses 2 × 8–12, leg curls 2 × 10–15, bench presses 3 × 8–12 and rows 3 × 8–12. The week therefore contains six pressing and six rowing sets. Your arms contribute even though there is no dedicated arm exercise.
| Muscle | Direct D | Indirect I | D + 0.5 × I |
|---|---|---|---|
| Chest | 6 | 0 | 6 |
| Back | 6 | 0 | 6 |
| Triceps | 0 | 6 | 3 |
| Biceps | 0 | 6 | 3 |
Zero direct triceps sets does not mean zero triceps training. Equally, the three estimated sets do not promise the same growth as three sets of extensions.
Week B: add two short arm exercises
Keep week A and add two sets each of curls and triceps extensions, using 10–15 repetitions, on both days. Two sessions give each arm muscle four direct weekly sets. The contribution from presses and rows stays the same.
| Muscle | Direct D | Indirect I | D + 0.5 × I |
|---|---|---|---|
| Chest | 6 | 0 | 6 |
| Back | 6 | 0 | 6 |
| Triceps | 4 | 6 | 4 + 3 = 7 |
| Biceps | 4 | 6 | 4 + 3 = 7 |
This is a clear change: four extra direct sets per arm muscle across the week. Adding several exercises and doubling every set at once would make the increase much larger.
Week C: more upper-body work across the same two days
Each day now contains leg presses 2 × 8–12, leg curls 2 × 10–15, bench presses 3 × 8–12, shoulder presses 2 × 8–12, rows 3 × 8–12, pulldowns 2 × 8–12, curls 2 × 10–15 and triceps extensions 2 × 10–15. This is substantially longer than week A; it is a counting example, not the required next step.
| Muscle | Direct D | Indirect I | D + 0.5 × I |
|---|---|---|---|
| Chest | 6 | 0 | 6 |
| Back | 10 | 0 | 10 |
| Shoulders | 4 | 6 from bench presses | 4 + 3 = 7 |
| Triceps | 4 | 10 from both presses | 4 + 5 = 9 |
| Biceps | 4 | 10 from both pulls | 4 + 5 = 9 |
The shoulder row mainly describes the front deltoids in this model. It does not measure every part of the shoulder equally. That distinction matters when you interpret a combined number.
What goes into the weekly-sets tool?
LiftPal's weekly-sets calculator counts direct sets. For week B, enter four direct biceps sets and four direct triceps sets. Calculate the extra three model sets from compound exercises separately. Do not enter seven as direct sets.
For your own week, write one line per muscle: direct exercises and sets, indirect exercises and sets, then the counting rule. Keeping those columns visible helps distinguish a real increase in training from a change in how you counted it.
Use the number to make a decision
The model helps reveal overlap. Someone who presses frequently starts additional triceps work from a different position than someone doing no pressing. A total alone cannot tell you whether another set is needed.
If performance is improving, the week feels manageable and you are moving toward your goal, there is no missing number to fill. When progress stalls, compare weights, repetitions and effort first. Then change one part of the plan and watch the response. Your own repeated training provides the context the calculation cannot supply.
Try a tool
Sources
- Pelland et al. (2026): The Resistance Training Dose Response ↗
- Schoenfeld et al. (2019): Calculating Set-Volume for the Limb Muscles ↗
Andrea Piacquadio / Pexels · Pexels License · Resized and converted to WebP for this website.


