How many sets and reps? Weekly sets, rep ranges and effort

A good start

2 to 3 sets of 8 to 12 reps per exercise, stopping 2 or 3 reps short of failure.

Sources 1, 2

Sets per muscle per week

About 4 hard sets a week is enough to grow, and 10 or more builds more. Beyond about 10 sets a week each extra set adds less, and past about 20 the extra gain is small.

Sources 3, 1, 4

Strength needs fewer sets

In the largest analysis, extra sets stopped adding measurable strength beyond about 4 to 5 sets per lift a week (figures from its preprint). Heavier weights and practising the lift more often help strength more than extra sets.

Sources 5, 1

Any rep range builds muscle

Anything from about 5 to 30 reps works if the sets are hard. Heavier weights build more strength: most people can bench press about 80% of their maximum 9 times, or leg press it 13 times.

Sources 6, 2, 7

Hard, not to failure

Going to failure gave no clear extra growth. Stop 2 or 3 reps short on big lifts, and expect to misjudge how many you have left by about one.

Sources 8, 1, 9

Beginners

2 sets per exercise for the first two weeks, then 3. Even one hard set per exercise builds strength.

Sources 1, 10

Reps, sets and RM

A rep is one lift, down and up. A set is a group of reps done without resting, so 3 × 10 means 3 sets of 10. RM (repetition maximum) is the heaviest weight you can lift a given number of times: your 1RM is the most you can lift once, your 10RM the most you can lift 10 times. Nobody needs to test their 1RM: at 80% of it, most people manage about 9 bench-press reps.

Source 7

Reps in reserve

RIR (reps in reserve) is how many more good reps you could have done when you stopped. 2 RIR means you stopped 2 reps short of failure. In 12 studies with 414 people, most underestimated by about one rep, and judged better near the end of a set, in later sets and with heavier weights.

Source 9

What counts as a hard set

A set that ends within about 0 to 4 reps of failure. Warm-up sets and easy sets don't count towards your weekly total (our working definition, as used in our plans' set counts).

How to count sets per muscle

Count a set for the muscle the move is mainly for: a squat for the thighs, a row for the back. The largest analysis counted sets that work a muscle indirectly, such as a row for the biceps, as half a set, which predicted results best (preprint figures).

Source 5

More sets, more muscleStrong evidence

In 15 studies, each extra weekly set added about 0.4% to muscle growth, with a trend in favour of 10 or more sets per muscle. The 2026 American College of Sports Medicine (ACSM) position stand, an overview of 137 reviews, found extra growth from 10 or more sets per muscle a week.

Sources 11, 1

Where the extra gain gets smallEmerging evidence

The largest analysis pooled 67 studies with 2,058 people, mostly young men. About 4 weekly sets produced measurable growth, and each further measurable step then took more sets: about 6 more between 5 and 10 sets a week, 8 or 9 more between 11 and 18, and 11 more between 19 and 29. There was no clear ceiling, but few studies tested more than about 25 sets (preprint figures; the published paper reports the same pattern). The ACSM reads this as little extra beyond about 18 to 20 sets a week.

In trained young men, 12 to 20 sets a week grew the thighs and biceps as much as more than 20. In another trial of 34 trained men, growth kept rising from 1 to 3 to 5 sets per exercise each session, while strength did not.

Sources 5, 4, 1, 12, 13

Strength levels off soonerEmerging evidence

More weekly sets help strength up to a point. In the largest analysis, extra sets stopped adding measurable strength beyond about 4 to 5 sets per lift a week (preprint figures). The ACSM puts the point of diminishing returns at 2 to 3 sets per exercise.

Sources 5, 14, 1

Two sets beat oneEmerging evidence

Multiple sets gave about 40% larger growth effects than single sets in 8 studies. The ACSM says one set is better than none and two better than one, and advises at least 2 sets per exercise.

Sources 15, 1

Light or heavy weights build muscleStrong evidence

When sets were taken to failure, light weights (60% of maximum or less) and heavy weights built similar muscle in 21 studies. In 28 studies with 747 people, light (more than 15 reps), moderate (9 to 15) and heavy (8 or fewer) loads built similar muscle. The ACSM found the same across 30% to 100% of maximum.

Sources 6, 2, 1

Heavy weights build more strengthStrong evidence

Moderate and heavy loads built more strength than light ones, and heavy was slightly ahead of moderate, though not clearly. The ACSM found strength rose more with weights of about 80% of maximum or more, 2 to 3 sets, doing the lift early in the session, and 2 or more sessions a week.

Sources 2, 1, 16

Failure isn't neededStrong evidence

In 15 studies, training to failure gave no clear extra growth compared with stopping short. Another analysis of 15 studies found no difference for strength or size, apart from a small growth advantage for failure in trained people. The ACSM says failure is not necessary and suggests stopping 2 to 3 reps short.

Sources 8, 17, 1

Closer to failure may grow a little moreEmerging evidence

Exploratory analyses suggest muscle growth rises as sets end closer to failure, while strength is similar across a wide range. In 18 trained people over 8 weeks, failure and stopping 1 to 2 reps short grew the thighs equally, and failure felt harder and less pleasant.

Sources 18, 19, 20

Time-efficient minimumsEmerging evidence

A review of time-efficient training suggests at least 4 weekly sets per muscle, with weights you can lift 6 to 15 times. In trained men, one hard set of 6 to 12 reps, 2 to 3 times a week, raised squat and bench-press strength in 5 studies.

Sources 3, 21

Starting out

6 to 10 hard sets per muscle a week, from two or three full-body sessions (our editorial starting point). Our 2- and 3-day plans give about 5 to 12.

Building more muscle

Build towards 10 to 20 over months. Beyond about 10 sets a week each extra set adds less, and past about 20 the extra gain is small.

Sources 1, 4

Short on time

About 4 hard sets per muscle a week, with weights you can lift 6 to 15 times, built around a squat or leg press, an upper-body pull and an upper-body push.

Source 3

Sets per exercise

At least 2, and each extra set adds less. To add weekly sets for a muscle, add a second exercise or session rather than more sets of one move (our suggestion).

Sources 1, 15

Exercises per session

5 to 7 moves covering an upper and lower push and pull is enough for most sessions (our editorial number, as in our workouts). The ACSM's authors say pushes and pulls for the upper and lower body train the major muscles.

Source 1

For strength

5 to 8 reps on heavy compound lifts such as squats, deadlifts and presses: roughly 80 to 90% of your maximum on the bench press. Do 2 to 3 sets, put the lift early in the session, and train it at least twice a week.

Sources 1, 7

For muscle

8 to 12 for most moves, and 12 to 20 for small isolation moves and bodyweight work. Up to about 30 works only if you take the set close to failure: judging your reps left gets harder beyond 12.

Sources 2, 3, 9

For muscular endurance

Light to moderate weights (40 to 60% of your maximum) for more than 15 reps, with short rests under 90 seconds, as the 2009 ACSM position stand suggests.

Source 22

For beginners

The 2009 ACSM stand suggests novices use weights they can lift 8 to 12 times. Learn the moves at an easy effort first; heavier sets of 5 to 8 can come later if strength is your goal.

Sources 22, 1

Big lifts: 2 to 3 reps in reserve

Squats, deadlifts, presses, rows and pulldowns: stop 2 or 3 reps short. It builds about as much as failure, with less fatigue, and your form holds up better (our suggestion).

Sources 1, 8, 19

Small moves: 0 to 2 on the last set

The last set of curls, raises, pushdowns or calf raises can get within 0 to 2 reps of failure, where a little extra effort may add a little growth.

Source 18

First two weeks: 3 or 4 in reserve

While you learn the moves, stop with 3 or 4 reps to spare. Most people misjudge reps left by about one, so this keeps you safely short of failure.

Source 9

Older lifters

The ACSM says training to failure may be unwise for older people. Stay 2 to 3 reps short, and still progress.

Source 1

One hard set already worksEmerging evidence

One set is better than none and two better than one. In 14,690 gym members doing one hard set of six exercises once a week, strength rose by about 30 to 50% in the first year. Single sets 2 to 3 times a week raised strength even in trained men.

Sources 1, 10, 21

Our starting point

Weeks 1 and 2: 2 sets of 8 to 12 per exercise, stopping with 3 or 4 reps to spare. Then 3 sets, stopping 2 or 3 reps short, with double progression (our plans' starting point).

Call 999 now (911 in the US)

Stop and call 999 for chest pain that feels tight or spreads to your arms, neck or jaw, for someone fainting while exercising, or for a sudden, extremely painful headache.

Sources 23, 24, 25

Get help the same day

Call NHS 111 (in the US, your doctor or urgent care) for a headache brought on by lifting or straining, or for severe muscle pain and weakness with dark or reduced urine after unusually hard training. That can be rhabdomyolysis, which can harm the kidneys.

Sources 25, 26

Breathe on every rep

Breathe out as you push and avoid holding your breath under heavy weights, especially if your blood pressure is high (our suggestion, as on each move's page). Our high blood pressure guide has the detail.

"Light weights tone, heavy weights bulk"Strong evidence

Light and heavy weights built similar muscle when the sets were hard; heavy weights built more strength. "Toning" is building some muscle, often while losing some fat.

Sources 6, 2

"8 to 12 reps is the only range for muscle"Strong evidence

It is a convenient range, not a special one: light, moderate and heavy loads grew muscle similarly in pooled trials.

Sources 2, 1

"You have to train to failure"Strong evidence

Failure gave no clear extra growth in two analyses of 15 studies each, and it feels harder and less pleasant. Stopping 2 or 3 reps short is enough.

Sources 8, 17, 20

"More sets are always better"Emerging evidence

Beyond about 10 sets a week each extra set adds less, and past about 20 the extra gain is small. For strength, extra sets stopped adding measurable gains after a handful per lift a week (preprint figures).

Sources 4, 5, 1

"You need at least 10 sets per muscle to grow"Emerging evidence

About 4 hard sets a week produced measurable growth in the largest analysis (preprint figures), and reviews suggest it as a floor when time is short. 10 or more builds more.

Sources 5, 3