What Does 3x5-8 Mean in a Workout?

Quick answer: 3x5-8 means three sets of somewhere between five and eight reps. The first number is sets, the range after it is the target rep window. You pick a weight you can lift for at least five reps, and once you can hit eight on every set, you add weight and drop back toward five.

You open the program someone sent you. Bench press, 3x5-8. Rows, 4x8-12.

You understand the three. You are less sure whether five to eight means "pick one" or "do all of them".

What does 3x5-8 actually mean?

It reads as three sets of five to eight reps. The format is always sets x reps, so the number before the "x" is how many sets, and everything after it is the reps.

When there is a single number after the x, like 3x8, you are aiming for exactly that many reps. When there is a range like 5-8, you have a target window instead of a target number.

• 3 = three working sets.
• 5-8 = each set should land somewhere between five and eight reps.
• The range is not a menu. You are not choosing five for one set and eight for another on purpose. You are trying to keep every set inside the window.

So 3x5-8 on bench means three hard sets, each finishing somewhere in that five to eight rep band.

Why do programs use a rep range instead of a fixed number?

Because a range lets one weight stay useful for several weeks. A fixed prescription like 3x8 forces you to change the load the moment you can do nine, or fail short at seven.

A range gives you room to progress without touching the plates. Week one you might get 6, 6, 5. Week three, 8, 7, 7. Same weight, real progress, and the log shows it.

The range also protects the quality of the sets. If a program said exactly 3x5 and you managed 5, 5, 3, you would be failing the prescription. With 5-8, that third set at 5 still counts.

Ranges also encode intent. A 5-8 range sits in heavier, strength-leaning territory. An 8-12 range sits in classic hypertrophy territory. We break the trade-offs down further in rep ranges explained.

How do you pick the weight for 3x5-8?

Choose a load you can lift for at least five hard reps on your last set, not your first. Most people pick their weight based on set one and then collapse by set three.

A simple way to find it:

1. Warm up, then take a set you think lands around 7 or 8 reps with 2 reps left in the tank.
2. Rest fully and repeat.
3. If your final set drops below 5, the weight was too heavy. If your first set sails past 8, it was too light.

If you have a recent heavy single or a hard top set, you can sanity-check the load by plugging it into the free one rep max calculator. A 5 to 8 rep window usually lands somewhere near 75 to 85% of an estimated one-rep max, though individual differences are large.

When to add weight

Add weight once you hit the top of the range on every set. For 3x5-8, that means 8, 8, 8 with decent form.

Then increase the load by the smallest useful jump, usually 2.5 kg on upper body and 5 kg on lower body, and expect to land back near the bottom of the range. That is the intended cycle, and it is exactly the mechanism described in double progression vs linear progression.

What do the other shorthand variations mean?

They all follow the same grammar. Once you can read 3x5-8, the rest of the notation falls into place.

Two conventions cause most of the confusion:

• Some coaches write reps first. 8x3 in a powerlifting program usually means eight sets of three, not three sets of eight. Context tells you which: eight sets of three is a normal strength prescription, three sets of eight is a normal hypertrophy one.
• The weight often gets bolted on. Squat 100x5x3 typically means 100 kg for 5 reps for 3 sets. Our workout shorthand explained guide covers the rest.

How should you write 3x5-8 in your own log?

Log what actually happened, not what the program asked for. The prescription is 3x5-8. Your log should say which reps you got and at what weight.

Write it however comes naturally in the gym:

Bench 80x8, 80x7, 80x6
Row 70x8, 70x8, 70x7

That single line tells you more than a tick next to "3x5-8" ever will. Next session you can see you owe yourself an 8 on the third bench set before adding weight.

The mistake to avoid is logging only the plan. If your notes say "Bench 3x5-8" every week, you have recorded your intentions, not your training, and there is nothing to progress against.

Turning shorthand into progress you can see

Shorthand is fast to write and slow to read. Flipping back through six weeks of 80x8, 80x7, 80x6 to work out whether you are progressing is the reason most people quit tracking.

Gym Note Plus exists for that gap. You keep writing sets in the same shorthand you already use, and it reads the notation and builds the charts.

• Understands rep ranges and set notation without a template.
• Shows per-exercise progression so you can see when you have earned the weight jump.
• Keeps your habit intact, because you are still just typing lines.

Want to see it before you commit? Paste a session written in your own shorthand into the free notes to workout translator.

A rep range is a program's way of telling you when to add weight. It only works if you write down the reps you actually hit.

Frequently Asked Questions

What does 3x5-8 mean in a workout?

3x5-8 means three sets of five to eight repetitions. The first number is the number of working sets, and the hyphenated range is the target rep window for each set. You select a weight you can lift at least five times, and increase the load once you reach eight reps on all three sets.

Should you do 5 reps or 8 reps in a 3x5-8 prescription?

Aim for the top of the range on every set. In 3x5-8, eight reps on all three sets is the goal that earns a weight increase. Five reps is the floor, meaning the load is too heavy if a set falls below it. Most lifters start near the bottom and climb over several weeks.

Is 3x5-8 good for building muscle or strength?

3x5-8 sits between the two and serves both. Five to eight reps is heavy enough to drive strength adaptations and close enough to failure to stimulate hypertrophy when sets are taken near failure. It works well for compound lifts like squats, bench press, rows, and overhead press.

What does the "x" mean in gym notation?

The "x" separates sets from reps and is read as "by" or "sets of". In 3x5-8, the x separates three sets from the five-to-eight rep range. When a weight is included, as in 100x5x3, the x also separates load from reps, giving 100 kg for 5 reps for 3 sets.

How do you know when to increase weight in a rep range?

Increase the weight when you reach the top of the range on every prescribed set with good form. For 3x5-8 that means 8, 8, 8. Add the smallest available increment, usually 2.5 kg upper body or 5 kg lower body, and expect your reps to fall back toward the bottom of the range.

Final takeaways

• 3x5-8 is three sets of five to eight reps. Sets first, rep range second.
• The range is a progression rule. Hit the top of it on every set, then add weight.
• Pick the weight for your last set, not your first.
• Log the reps you actually hit. A log that only records the plan cannot show progress.
• Read the notation once and the rest follows. 4x8-12, 5x5, and 3xAMRAP all use the same grammar.