Training
Reps and sets explained: what 3×10 actually means
A rep is one complete execution of an exercise. A set is a group of reps done back to back before you rest. A programme written as 3x10 means three sets of ten reps, thirty reps in total. The first number is almost always sets and the second is reps.
Reps, sets and rest
- Rep, short for repetition: one complete execution of the movement, from start position through the full range and back.
- Set: a group of reps performed continuously, without rest.
- Rest: the pause between sets. It is part of the prescription, not a gap in it. Heavy strength work needs several minutes; lighter work needs far less.
Rest is the part beginners ignore and it changes the training effect substantially. The same 5×5 done with thirty seconds of rest and with three minutes of rest are two different sessions.
Reading a programme
The convention is sets × reps. So:
| Written | Means | Total reps |
|---|---|---|
| 3 × 10 | Three sets of ten | 30 |
| 5 × 5 | Five sets of five | 25 |
| 4 × 8–12 | Four sets, eight to twelve reps each | 32–48 |
| 3 × AMRAP | Three sets, as many reps as possible | Open |
| 10 × 10 | Ten sets of ten, German volume training | 100 |
| 12/10/8/6 | A pyramid, one set at each rep count | 36 |
A range such as 8–12 means work in that window: if you can exceed the top of the range, the weight goes up next session. If you cannot reach the bottom, it goes down.
What rep ranges are for
Rep ranges are guidelines rather than hard boundaries, and the effects overlap considerably. The broad picture that most coaches work from:
| Reps per set | Emphasis | Typical rest |
|---|---|---|
| 1–5 | Maximal strength | 3–5 minutes |
| 6–12 | Size, with strength carryover | 1–3 minutes |
| 12–20 | Muscular endurance, size at lighter loads | 30–90 seconds |
| 20+ | Endurance and conditioning | Under a minute |
The important caveat: effort matters more than the range. A set of twelve taken close to failure does more than a set of five taken comfortably. This is general information about common training conventions, not individual advice, and anyone training around an injury should work with a qualified coach or physiotherapist.
Volume, and why it matters
Volume usually means total reps, or sets multiplied by reps multiplied by weight. It is the number most closely associated with progress over time, which is why programmes track it.
The practical use is comparison across weeks. Four sets of eight at 80kg is 2,560kg of volume for that exercise. Three sets of twelve at 70kg is 2,520kg, which is nearly identical despite looking like a very different session. Without counting, that comparison is guesswork.
Keeping count without losing the set
Losing count at rep eight of twelve is the most common reason a set finishes short. Three habits fix it:
- Set the target before the first rep. With a maximum set, the counter tells you when the set is done and you stop tracking two numbers at once.
- Use haptic feedback, not the screen. Vibration confirms the tap so you never look away from the movement.
- Keep reps and sets in separate counters. A single number climbing to thirty does not tell you whether that was three tens or two fifteens.
Log the totals at the end of the session. The counter holds the session, not the history, and the comparison across weeks is where the value actually is.
Frequently asked questions
What does 3x10 mean in a workout?
Three sets of ten repetitions, thirty reps in total. The convention is sets first, reps second. You perform ten reps, rest, and repeat twice more for a total of three sets.
What is the difference between a rep and a set?
A rep is one complete execution of an exercise. A set is a group of reps performed back to back without rest. Rest between sets is part of the prescription and materially changes the training effect.
How many reps should I do to build muscle?
Six to twelve reps per set is the range most commonly used for size, but effort matters more than the exact number. Sets taken close to failure across a range of rep counts produce similar results in most people.
What does AMRAP mean?
As many reps as possible: perform reps until you cannot complete another with good form. Because the point is an exact maximum, it is the case where counting accurately matters most.
What is training volume?
Volume usually means total reps, or sets multiplied by reps multiplied by weight. It is the figure most closely associated with progress over time, which is why it is worth recording rather than estimating.