"How many sets per muscle group per week?" is the single most important question in hypertrophy training. Because training volume, measured in working sets per muscle group per week, is the primary driver of muscle growth according to the current body of research. Not exercise selection, not rep count, not training system. Volume.
The problem: most training plans give a blanket recommendation ("3×10 for everything") without accounting for the fact that different muscle groups, experience levels, and training phases require completely different volumes.
The largest and most current meta-analysis on the relationship between training volume and muscle growth comes from Pelland et al. (2024), 67 studies, 2,058 participants, published in Sports Medicine. The central finding: there's a clear dose-response relationship between sets per week and muscle growth. More sets lead to more hypertrophy, but with diminishing returns.
The earlier analysis by Schoenfeld & Krieger (2017) reached the same conclusion and defined specific volume ranges by experience level, which Pelland confirmed.
| Experience Level | Sets/Week/Muscle | Source |
|---|---|---|
| Beginner (<1 year) | 6–10 sets | Rhea et al. 2003 |
| Intermediate (1–3 years) | 10–16 sets | Schoenfeld & Krieger 2017 |
| Advanced (3+ years) | 16–22 sets | Pelland et al. 2024 |
Important: these numbers refer to effective working sets, not warm-up sets. A set only counts if performed at RIR 3 or less.
The ranges in the table are reference values from studies, not what the app plans. Today MUSCLE TECHNICS plans 6 direct sets per week for each large muscle group (legs, back, chest) for beginners, 9 for intermediates and 12 for advanced lifters. The legs get this number twice: once for the front of the thighs (e.g. squat, leg extension) and once for hamstrings and glutes (e.g. Romanian deadlift, leg curl).
This is where it gets interesting. Pelland et al. (2024) introduced fractional set counting:
Consider this workout: 4 sets bench press (chest: 4.0, triceps: 2.0, front delt: 2.0), 3 sets incline (chest: 3.0, triceps: 1.5), 3 sets tricep pushdowns (triceps: 3.0). Without fractional counting you think: "My triceps got 3 sets." Reality: triceps = 3 + 2.0 + 1.5 = 6.5 sets. For a beginner with a triceps range of 6–10, that's already in the upper zone, from just one session.
This is why so many lifters unknowingly overtrain smaller muscles while undertraining larger ones.
MEV (Minimum Effective Volume): The minimum for measurable growth. About 4–6 sets/week for most muscles.
MAV (Maximum Adaptive Volume): The sweet spot, best stimulus-to-recovery ratio. Typically 10–16 sets/week for intermediates. Spend most of your mesocycle here.
MRV (Maximum Recoverable Volume): The ceiling. Beyond this you can't recover and training becomes counterproductive. Usually 18–22 sets/week depending on the muscle, age, sleep, nutrition, and stress.
Volume shouldn't stay constant but increase systematically in 4–6 week blocks (Painter et al. 2012):
Weeks 1–2: Start at MEV range. Weeks 3–4: Increase to MAV. Add 1–2 sets per muscle group. Weeks 5–6: Approach MRV. Maximum stimulus but also maximum fatigue. Week 7 (Deload): Half the volume, keep the weight. Accumulated fatigue fades.
You'd need to track weekly volume for each of 6 muscle groups, including fractional sets from compounds. That's 12–18 exercises whose primary and secondary muscles you'd need to know and assign. Plus recognizing when MRV is reached through e1RM tracking.
This is exactly why more lifters are turning to AI coaching. A system like MUSCLE TECHNICS calculates weekly volume per muscle group automatically, including fractional set counting. The plan itself comes from a weekly target of direct sets per muscle group, spread across the sessions in which that group comes up. And if your e1RM in a muscle group clearly drops, it removes sets from that group, while every exercise keeps a minimum number of sets.
Including fractional set counting (Pelland 2024), a deload on fatigue, and fewer sets for any muscle group whose e1RM clearly falls.
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