SYNTH-105 · Guide
Starting or restarting strength training
Begin at the bottom of the standard dose: two full-body sessions a week, three to five big movements, two sets each, short of failure, for the first weeks, then two to three; one set when time is short; more than three sets per exercise was not shown to add strength
The question it answers
"I have never lifted, or I am back after half a year — how much should I do?" and its mirror: "why does the plan give me so many sets?" The answer is a starting dose, a reason it is small, and a rule for when to add.
Default (what to prescribe first)
Two sessions a week, full body. At least two sessions a week raise strength (REF-1476, A); the 2009 stand gave novices 2-3 days a week at an 8-12 repetition maximum (REF-1627, B+). With volume equal, training more often did not change strength gains in a meta-analysis of 12 studies (REF-1624, B+), so two sessions are enough to start; a third is for later or for more sets (inference).
Three to five big movements: at least one squat or leg press, one push and one pull — a narrative review's minimum for a time-efficient programme (REF-1629, C+); add a hinge (deadlift or hip thrust) and a trunk exercise if time allows (the base's practice).
Two working sets per exercise for the first 2-4 weeks, 8-12 reps well short of failure, after a lighter warm-up set, then two to three at heavier loads — the bottom and then the middle of the standard dose for strength (REF-1476, A: at least 2 sessions a week, 2-3 sets per session; the stand advises at least two sets per exercise).This matches SYNTH-101's beginner row (2-3 sets of 8-12 well short of failure); the ramp is practice. A review's minimum for strength and size is at least four sets per muscle group a week at 6-15 RM (REF-1629, C+), which two sessions of two sets reach.
One set per exercise is the fallback when time is short. It raised strength in trained men when taken to volitional or momentary failure, 6-12 reps at about 70-85% 1RM, 2-3 times a week (REF-586, B+), and in people who do not lift (REF-1141, C+); well short of failure it is a transfer, and one set twice a week stays under the four-set weekly minimum above.
Decision
| Situation | Dose | Why |
|---|---|---|
| Habit, health, little time, or an endurance athlete in a heavy training phase | 1-2 sets per exercise, 2 sessions a week, kept (for the endurance athlete a transfer: no source here measured endurance athletes) | One set raised strength (REF-586, B+, to failure; REF-1141, C+); the gains per extra set shrink (REF-1477, B+); a minimal-dose programme was not established by the 2026 stand (REF-1476) |
| Default after the first 2-4 weeks, or any strength goal (lifting, HYROX, a strength test) | 2-3 sets per exercise, 2+ sessions a week, heavy loads (the stand: at least 80% 1RM; reading that off reps and RPE is the base's practice), stopping a few reps short | The 2026 stand's strength dose (REF-1476, A); 2-3 sets gave about 46% more strength than one, 4-6 not clearly more (REF-1626, B+); low weekly set counts gave the smallest gains (REF-1623, B+) |
| Goal: muscle size | Build towards at least 10 weekly sets per muscle group, spread over 2-3 sessions (the spread is practice) | The 2026 stand's hypertrophy dose (REF-1476, A); size keeps rising with volume for longer than strength does (REF-1477, B+; REF-513, B+: about 0.37% more growth per extra weekly set) |
| Beginner aged 60+ whose goal includes muscle | Start at 2 sets, then move towards 4 sets per exercise | In 85 untrained adults aged about 68, one set to failure twice a week left 60% with no measurable quadriceps growth in 10 weeks; four sets grew it in the same people and doubled their strength gain (REF-1630, B+, one exercise, protein supplemented) |
| Endurance athlete in a build | Heavy, few reps, short of failure, twice a week, once the way-in weeks are done | SYNTH-43 (cyclists), SYNTH-44 (runners) |
| Little time on a given week | Keep the session, cut sets, not the hardest lift (practice) | A low set count still raised strength (REF-1623, B+: low weekly sets ES about 0.8); heavier load is a lever for strength (REF-1476, A); with volume equal, frequency did not change strength (REF-1624, B+), so moving the sets to another day is the alternative (inference) |
How to progress / periodise
Add load first, then sets. The next load comes from the last done set and its RPE, one axis at a time (SYNTH-101). Sets go from 2 to 2-3, and loads up from the 8-12 range, once the first weeks have gone without lasting soreness; past three sets per exercise only for a muscle-size goal (practice, on the curves above).
One set more per exercise at a time, kept for 2-4 weeks before the next (practice; no trial compared step sizes).
When NOT to use it / red flags
A plan that opens with 4-6 sets of five or more exercises for a beginner or a returner: 4-6 sets per exercise were not clearly better than 2-3 for strength (REF-1626), and an unaccustomed first dose is the one that makes the most soreness (PHYS-24); that it is also the one most likely to be skipped is inference.
Pain that is sharp, worsens through a set, or lingers to the next day at one joint: swap or drop that exercise and, if it persists, see a clinician (the base's practice, SYNTH-94 for runners' pain).
What the evidence does and does not show
Shows (an overview of 137 systematic reviews, read in full; meta-analyses read from abstracts; mostly inexperienced young adults): load, sets and at least two sessions a week raise strength, at least 10 weekly sets raise size (REF-1476); strength rises with weekly sets (REF-1623, REF-1477), with diminishing returns that come sooner than for size (REF-1477); 2-3 sets per exercise beat one (REF-1626); frequency matters little once volume is equal (REF-1624), while the newest meta-regression finds frequency raising strength with diminishing returns, in models not stated to hold volume fixed (REF-1477; the abstract gives no effect size).
Does not show: a minimal-dose programme that keeps working (the 2026 stand could not establish one); which starting dose leads to more people still lifting after six months; the right number of sets for an endurance athlete in a heavy training week; how far to go back after a break (house practice, SYNTH-101).
Evidence gaps
No trial compared starting doses in beginners on adherence, soreness or injury.
The meta-analyses pool mostly young men; the abstracts give no per-sex or per-age split.
The 2009 ACSM stand's novice line (8-12 RM, 2-3 days a week, REF-1627) is updated by the 2026 stand, which sets no novice-specific dose.
How this entry was checked and changed
Why this level
the standard dose rests on ACSM's 2026 overview-based stand (REF-1476, A) and three meta-analyses read from their abstracts (REF-1626, REF-1623, REF-1477, B+), frequency on REF-1624 (B+); the "one set works" floor on a small meta-analysis in trained men (REF-586, B+) and a narrative overview (REF-1141, C+); the starting ramp itself (how many sets in which week, the RPE of the first sessions) is the base's practice, not a trial that compared starting doses
Content correction 2026-11-06
2026-11-06: written after the editor asked why the assistant gives beginners so much: the base had the pieces (REF-586, REF-1141, REF-513, SYNTH-101) but no guide for a starting dose; seven entries added the same day (REF-1622…1624, REF-1626…1629) carry the dose-response and the maintenance side (SYNTH-106); ACSM's 2026 stand (REF-1476), already in the base, sets the standard dose.