Can you use ChatGPT to write workout programs for clients?

Many trainers already do this, and many clients arrive with a plan a chatbot wrote for them. What matters is where these tools are reliable and where they are not. That has been tested, by coaches, more than once.

What did the studies find?

Three findings repeat across them.

The structure is fine. Sensible splits, sensible exercise choices and a recognisable shape. For a new trainer that is the slow part of a first draft. For an experienced one it is typing saved.

The hard decisions are missing. How much load, how close to failure and how it gets harder from week to week. In the 2025 study, the missing detail on intensity was a limitation across every model tested.³ Those decisions are the coaching.

The prompt matters. The running study saw the median rating go from 2 to 4 out of 5 as the prompt gained detail.¹ That is ten coaches rating three plans, so read it as a direction, not a measurement. A later study found that the same detailed prompt gave plans of the same quality each time.⁶

Where does it help, and where does it fall short?

What should a prompt include?

Everything you would ask a new client, minus anything that identifies them. A brief that states the person, the constraints and the format gets a draft you can work with.

Act as a strength coach writing a draft that I, a qualified trainer, will review and edit.

Write week 1 of a training program for this person:
- Goal: [one outcome, such as a first pull-up or a stronger squat]
- Training experience: [months or years, and what they have done]
- Days per week: [number], about [minutes] per session
- Equipment: [full gym / dumbbells and a bench / bodyweight only]
- Movements to avoid: [any, described generally, with no medical details]

Rules:
- 4 to 6 exercises per session, hardest lift first.
- For every exercise give sets, a rep range, reps in reserve and rest time.
- Letter the order (A, B1, B2) and say how many rounds a superset runs.
- Use one standard name for each exercise.
- Give one easier and one harder swap for each main lift.
- Do not add nutrition, supplement or medical advice.

Here is week 1 of the program: [paste it].

Write weeks 2 to 4.
- Keep the same exercises, so progress is visible.
- Use double progression: add reps within the range, then add load and return to the bottom of the range.
- State the rule for adding load in one line the client can follow alone.
- Make week 4 lighter: the same exercises with about one third fewer sets.
- Show each week as a table and list what changed from the week before.

Rewrite this program so a beginner can follow it alone in a gym, reading on a phone: [paste it].

- Short lines. No abbreviations unless explained once.
- Keep every number exactly as written.
- Add one coaching cue per exercise, 10 words or fewer.
- Add one line each for: the set felt too easy, the set felt too hard, the equipment is taken.

What should you check before a client sees it?

What about privacy and responsibility?

Two things are worth knowing before you paste anything in.

The responsibility stays with you. OpenAI's terms say you should not rely on output "as a sole source of truth or factual information, or as a substitute for professional advice", and that you must evaluate it "for accuracy and appropriateness for your use case, including using human review as appropriate".⁷ An article in a National Strength and Conditioning Association journal makes the same point from the trainer's side: blind use of a generated program could lead to a liability claim, and the tool is better suited to generating ideas than to prescribing.⁸

What you type in is your responsibility too. The same terms say you must have the rights to anything you input, and that content may be used to improve the service unless you opt out.⁷ The simple rule: describe the client in general terms. No names, no dates of birth, no medical history, no screening forms.

What if a client brings you a plan a chatbot wrote?

It happens, and it is a good opening, not a threat. Run the same eight-point check on their plan, in front of them. The gaps it shows are the ones the studies found: no real progression, no stated effort, nothing specific to them. That conversation explains what a coach is for better than any sales page.

Should you tell clients you use it?

We found no professional body that requires it. Clients pay for your judgement, and that is still what they are getting if you draft with a tool and decide yourself. If a client asks, a plain answer costs nothing: "I draft with it. Every number in your program is my call." What damages trust is a plan that reads as if nobody checked it.