A repetition is one complete movement; a set is a group of repetitions. Learning this vocabulary can make a first strength session less confusing. It does not replace instruction in how to perform an exercise or choose an appropriate load.
Start with the basic terms
The CDC describes strength activities using repetitions and sets, and lists weights, resistance bands and body-weight exercises as options. Adult guidance includes muscle-strengthening activity on at least two days each week, covering the major muscle groups. Source: CDC, What Counts as Physical Activity.
- Rep: one complete repetition of a movement.
- Set: several repetitions grouped together.
- Resistance: what you work against, such as a weight or band.
- Rest: the pause between efforts.
Decode a sample instruction
“Two sets of eight repetitions” means completing a group of eight movements and then another group of eight, with the instructed rest between them. It means 16 repetitions in total, not 16 sets. This arithmetic example is not a workout prescription or a recommendation for a particular exercise.
If an instruction says “each side,” ask whether the number applies separately to each side. If a band is involved, ask which band to use and how it should be positioned. A short clarification is more useful than silently guessing.
What to ask at a first session
- Can you demonstrate the exercise and watch me try it?
- How should the equipment be adjusted for me?
- What should I do if I cannot complete the instructed movement comfortably?
- How long should I rest, and what should I record?
- Which part of this plan should stay the same before anything is increased?
Write down the answer in ordinary language. A routine you can explain back is easier to follow than a page of unexplained abbreviations.
A simple training-note format
Use columns for the exercise name, equipment setting, sets, repetitions and a question for next time. Include the unit if a weight is recorded: pounds and kilograms are not interchangeable. Do not compare two machines solely by the number printed on their weight stacks.
Vocabulary is not a safety assessment
A beginner glossary cannot select the right exercises for an injury, a medical condition or a rehabilitation programme. Bring those circumstances to an appropriately qualified professional. Avoid treating difficulty, soreness or an impressive number as proof of a good session.
The immediate goal is understanding the instructions well enough to ask useful questions and receive clear feedback.
Related reading
- Moderate vs. Vigorous Exercise: Use the Talk Test
- Balance Activities for Older Adults: What to Ask Before Starting
- Explore all wellness guides
Prepared for Tranquilla Wellness with AI assistance. Sources checked September 13, 2026. General education; no independent clinical review is claimed. Read our editorial standards.