Workouts

Sets, reps and rest: how many should you do?

Sets, reps, load, rest. The language of the gym sounds complicated, but the idea is simple. Here is what each word means and what beginners usually do.

By the GymStarterGuide team · Updated October 27, 2026 · 5 min read

Every workout plan is written in a shorthand like “3 × 10”. This guide translates the shorthand and tells you what novice lifters are usually advised to do.

The words you need

  • Repetition (rep). One complete movement, for example one squat down and up.
  • Set. A group of reps done in a row, for example 10 squats, followed by a rest.
  • Load. The weight you use.
  • Rest. The time between sets.
  • “3 × 10” means 3 sets of 10 reps.

What the guidance suggests for novices

IDEA Health & Fitness Association’s summary of the American College of Sports Medicine (ACSM) position stand on resistance training gives these recommendations for novice lifters:

VariableRecommendation for novices
Frequency2–3 days a week, using total-body workouts
Sets1–3 sets of each exercise
Repetitions8–12 repetitions per set
Rest between sets1–2 minutes
Recovery between workouts24–48 hours, depending on fitness level

These are guidelines, not laws. They give you a safe starting range to experiment inside.

How heavy is “heavy enough”?

Research papers often describe load as a percentage of your “one-rep max”, the most weight you can lift once. You do not need to find yours. Testing it is hard on a beginner’s body and needs a spotter. Use this easy rule instead:

  • Pick a weight that lets you complete all the reps with good form.
  • You should finish each set feeling that you could have done 2 or 3 more reps.
  • If the last reps are slow and your form changes, it is too heavy.
  • If you could do many more reps, it is too light.

In coaching language this is called “reps in reserve”. It is a rule of thumb used by many coaches, not a number from the guideline.

What about rest?

Rest 1–2 minutes between sets of most exercises. Use a timer on your phone, or just walk to the water fountain and back. Heavy compound lifts such as squats and deadlifts may need a little longer. Light exercises such as curls or lateral raises can be shorter. Between workouts, give each muscle 24–48 hours of recovery. Read more about how many days a week to train.

Rep ranges: what they mean in practice

Reps per setWhat it usually feels likeUsed for
3–6Heavy and demanding, form is criticalStrength work for more experienced lifters
6–10Challenging but controlledA common range for the big lifts
8–12Moderate, the range suggested for novicesMost beginner plans
12–15Lighter weight, burning feelingSmaller muscles, learning a movement, warm-ups

For beginners, the 8–12 range from the guidance is a practical default because the weights are light enough to learn good technique.

Tempo and control

Tempo is how fast you lift and lower. You do not need to count, but keep these simple rules: lift smoothly without jerking, lower the weight slower than you lift it (about two to three seconds), and avoid bouncing at the bottom. Controlled reps are safer and teach your muscles the movement.

Supersets and circuits

A superset pairs two exercises and you do one after the other with little rest, for example a push exercise and a pull exercise. It saves time when the gym is busy. A circuit strings several exercises together. Both are fine once you know the movements. When you start, doing straight sets with proper rest helps you concentrate on form.

Putting it together: an example

Imagine you are doing the goblet squat from our 3-day plan.

  1. Warm up with bodyweight squats and a lighter set of goblet squats.
  2. Choose a dumbbell that you can lift 10 times, with 2–3 reps left in the tank.
  3. Do 3 sets of 8–12 reps, resting 1–2 minutes between sets.
  4. When you can do 12 reps on every set, use a slightly heavier dumbbell next time.

That last step is called progressive overload, and it is how you keep improving.

Quick questions

  • Is it OK to do fewer sets? Yes. The guidance starts at 1 set. Doing 2 sets in your first week is perfectly fine.
  • Should I count seconds for each rep? You do not need to. Lift with control and lower the weight a little slower than you lift it.
  • What if I am sore? Some soreness after a new workout is common. If it makes it hard to move normally for several days, do less next time.

Pfizer’s beginner guidance adds: start with light weights, increase gradually, use proper technique and take rest days between workouts.

Frequently asked questions

Is 3 sets better than 1 set?

The guidance for novices allows 1–3 sets. More sets means more work and more time, and it is a way to progress when 2 sets feel easy. Start with 2 sets in your first week and build to 3.

What if I cannot finish the reps?

Lower the weight, or stop a rep or two earlier. It is fine to do 8 reps, then 7, then 6 on the last set. Next time, try the same weight again.

Do I need to count seconds of rest?

A timer helps, but you can also rest until your breathing has settled and you feel ready. One to two minutes is the typical range.

How do I write down “3 × 8–12”?

It means 3 sets, each with 8 to 12 reps. If you hit 12 on every set, it is time to add weight.

Listen to your body

Stop an exercise if it causes pain. Ask a healthcare professional if you have a medical condition or injury.

Sources

  1. Progression models in resistance training for healthy adults. IDEA Health & Fitness Association (summary of the ACSM position stand).
  2. Strength training for beginners. Pfizer Health Answers.

Sources last checked in October 2026. Official guidance changes, so check the original pages for the latest figures.

This guide is general information for healthy adults, not medical advice. Stop if something hurts, and talk to a doctor if you have a health condition, an injury or any doubt. Read our full disclaimer.