Reps, Sets, and Rest: A Simple Way to Understand Resistance Training Terminology

When you first walk into a gym, the language can feel a bit overwhelming. People throw around terms like reps, sets, and rest as if everyone just knows what they mean. But once you understand these three words, resistance training becomes much easier to navigate.

Let’s break them down in a way that actually makes sense, and more importantly, in a way you can use.

Reps: How Many Times You Do the Thing

“Reps” is short for repetitions. It simply means how many times you perform an exercise.

If you’re on a chest press machine and push the weight 10 times, that’s 10 reps. Simple.

Where people tend to get stuck is wondering: how many reps should I do?

If you’re not a competitive athlete or chasing extreme goals (and most people aren’t) you don’t need to overthink this. A practical approach is to pick a rep range, like 8 to 12 reps, and stick with it.

What matters more than the exact number is how those reps feel. You want them to be challenging, especially toward the end. By the last few reps, it should feel tough, like you’re close to your limit but still able to complete them with good form.

The real key isn’t finding the “perfect” rep range. It’s consistency over time. Pick a range, stick with it, and gradually increase the weight as you get stronger over weeks, months, and years.

Sets: How Many Chunks of Work You Do

A “set” is just a group of reps.

For example: You do 10 reps (set 1), then rest, do another 10 reps (set 2), then rest and then do a final 10 reps (set 3)

That’s 3 sets of 10 reps.

Sets are essentially how you structure your workout volume.

Now, how many sets should you do?

Again, it depends on your goals and your schedule. If you’re a normal person with limited time, maybe training 1-3 times per week, then you don’t need a huge amount.

A good rule of thumb: Aim for around 4–6 hard sets per exercise per week

How you split that up depends on how often you train:

• If you train once a week, then maybe do 4 sets in that session

• If you train twice, then split it into 2–3 sets each time

• If you train more often, then spread it out further

Beyond that, you’ll often hit diminishing returns. More isn’t always better, especially if it’s hard to recover or fit into your schedule.

Rest: The Part Most People Underestimate

Rest is where a lot of people go wrong.

If you don’t rest between sets, your performance drops quickly. You might do 10 reps on your first set, then only manage 4 on the next, and then barely anything after that.

Why? Because your muscles use fuel when you train. Push hard enough, and you temporarily run out. That’s the point where the weight just won’t move anymore.

Rest allows your body to replenish that fuel, so you can perform well again in the next set.

Ideally, each set should feel like a proper effort, not something you’re suffering to start because you’re still exhausted from the last one.

So, how long should you rest?

There’s no perfect answer. It’s personal.

• Some people feel ready after about a minute

• Others need closer to 2–3 minutes

• Longer rest can improve performance, but it also makes workouts take more time

Most people find a good balance around 1 to 2 minutes. It’s long enough to recover reasonably well, but short enough to keep your workout time efficient.

The right rest time is the one that lets you perform well and fit training into your life consistently.

Key takeaways

It’s easy to get caught up in trying to optimise everything, perfect reps, perfect sets, perfect rest times.

But the truth is simpler:

• Pick a rep range and stick with it

• Do a reasonable number of sets each week, enough to get stronger

• Rest enough to perform well, within your time limits

• Gradually increase the weight over time

That’s it.

You don’t need perfection. You need something that works and that you can keep doing for a long period of time. Remember that consistency is key!

If you’d like more support, I also offer one-to-one personal training. You can find out more here.