The programme says chest press. The machine offers a column of numbers. What it does not tell you is which one belongs to you.

Your first session can be a chance to learn that answer. You do not have to arrive knowing your ideal training weight. For a healthy adult learning familiar gym equipment with appropriate instruction, the useful goal is to find a manageable starting point, record it and adjust from experience.

Learn the setup before judging the weight

Ask a member of staff to demonstrate equipment you have not used. Check how to adjust the seat, select the resistance and finish the movement. If you cannot tell how to get into or out of position, choosing a different number on the stack will not solve that problem.

Keep the exercise name and setup in your notes. “Chest press, seat position three” is more useful next week than “upper body machine.” A record is not a scorecard. It is a way to avoid having to solve the same small decisions again.

Use a first attempt to gather information

Here is a practical example, not a scientifically validated load-selection test. Start with a resistance you expect to be easy and rehearse the movement you have been shown. Notice whether you can move with control and whether the setup feels manageable. Follow the repetition range in your programme, rather than extending the set indefinitely to prove something.

If the attempt feels plainly too demanding to complete as instructed, reduce the load or ask for help. If it feels easy and the setup is familiar, you can consider a small increase after resting. There is no need to keep making increases throughout the session until you discover the heaviest possible weight. A repeatable starting point is enough information for the next visit.

Do not use this approach to test through pain. Sharp pain, unusual symptoms or difficulty controlling the equipment are reasons to stop the attempt. Returning after an injury or managing a medical condition calls for advice suited to that situation.

A decision you can use at the machine

Suppose your existing programme asks for 8–12 repetitions. These examples explain the decision, not which weight you personally should lift:

• You cannot reach eight controlled repetitions. End the attempt rather than changing the movement to finish the number. After resting, consider a lower resistance and recheck the setup.
• You complete ten, with the last few becoming demanding while remaining controlled. Record that result. You have a starting observation; you do not need to test your maximum to make it useful.
• You reach twelve and it still feels very easy. Note it and consider the smallest manageable increase allowed by your programme. A first visit can also end with that information for next time.

The range comes from the hypothetical programme, not a universal rule. If your own plan uses a different range or stopping instruction, use that context. Control and comfort are observations, not a guarantee against injury.

What does “repetitions in reserve” mean?

You may see a programme ask you to finish with two or three repetitions in reserve. This means estimating how many further repetitions you could complete before reaching the defined stopping point. It is an estimate of proximity to failure, not a number displayed by your muscles.

A scoping review and exploratory meta-analysis found that people were imperfect at predicting how many repetitions remained. Results differed substantially between studies, and training experience did not clearly explain accuracy. That means there is little reason to feel embarrassed if the question is difficult at first. It also means a coach should not treat your answer as an exact measurement. [1]

A newer systematic review likewise found that accuracy depended on the conditions, with estimates generally more accurate closer to failure and with higher relative loads. [2] That finding describes measurement accuracy. It does not mean beginners should deliberately push to failure or select heavy loads just to make their estimates more precise.

The 2026 ACSM position stand supports the bigger picture: reaching muscular failure is not required to benefit from resistance training. It also notes that the evidence cannot establish exact repetitions-in-reserve targets for everyone. Use effort targets as part of an understandable programme, rather than treating one number as a pass-or-fail test. [3]

Write down what happened, not just how you felt about it

A useful note might read: “Same seat setup, ten controlled repetitions, last few felt harder, could probably do a few more.” The next session gives you another observation. You can compare repetitions, technique and perceived effort without expecting every visit to be better than the last.

If a programme specifies an effort target you do not understand, ask the person who wrote it how they want you to use it. “Stop when I could do another few controlled repetitions” may be a more useful initial explanation than introducing several scales at once.

Three ordinary situations

The next increment feels too large. Do not force a jump simply because it is the next available setting. Keep the manageable load and discuss another progression option if your programme requires one. More equipment options can help, but buying equipment is not the first solution to every training problem.

You feel weaker today. Treat today's session as today's session. Sleep, the rest of your day and the circumstances of training can vary. You can record a lighter session without turning it into a judgement about your progress.

You are comparing yourself with the next person. Their number cannot tell you whether your choice fits your movement, programme or experience. Return to the information you can use: your setup, your completed repetitions and how the exercise felt.

Leave with a useful starting point

Before your next gym visit, make a short note for your first exercise: the setup you need to check, the repetitions your programme asks for and the resistance you last used. If it is your first visit, make asking for a demonstration part of the plan.

You are learning a skill as well as doing a workout. A session that leaves you less confused about the next one has given you something worth keeping.