Sets, Reps, Rest & Tempo
The basic language of a training program, and why "3 sets of 10" isn't magic.
Every program is built from the same handful of variables. Understand them and you can read any workout—and understand why it's written the way it is.
The vocabulary
Repetition (rep)
One complete movement—down and up on a squat.
Set
A group of reps done without resting.
Warm-up set
Lighter sets that prepare you for the work. Usually not counted as training volume.
Working set
The sets that are meant to challenge you and drive adaptation.
Rep range
A target span, like 8–12, instead of one fixed number. Gives room for day-to-day variation.
Load
How much resistance you're using: weight, band tension, or bodyweight.
Rest interval
The time between sets.
Tempo
How fast you move through each part of a rep.
Range of motion
How far you move through a joint or exercise.
Proximity to failure
How close to "I couldn't do another good rep" you finish a set.
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In the rest of this guide
- Why 3 sets of 10 isn't magic
- How each variable changes the demand
- Tempo notation, simply
- Practical examples