How to choose a personal trainer

The minimum, and why it is only the minimum

Two things are non-negotiable and neither tells you whether someone is a good coach.

• A recognised qualification. In the UK, Level 3 Personal Trainer or equivalent; frameworks differ by country. Ask, and expect a specific answer without hesitation.
• Insurance. Public liability and ideally professional indemnity. A professional will show you without being offended.
• Current first aid is a reasonable third.

These are entry requirements. A great many qualified, insured trainers are mediocre coaches, because the qualification covers safety and basic competence rather than the skills that produce results — see insurance, qualifications and the paperwork.

The questions to ask

The last two rows matter most.

"What do you not do?" is the single most informative question you can ask. A good coach will say something like: "I do not write meal plans — that needs a registered nutrition professional, and I can refer you. I do not rehabilitate injuries; I work alongside physios." A coach who claims competence in everything is telling you they do not know where their limits are — see scope of practice: nutrition advice and where the line is.

"How long will this take?" A good coach gives you a range in months with caveats. A confident promise of a specific transformation by a specific date is a warning sign — see how long until you see results.

Good signs

• They ask about you before selling to you. Your history, your schedule, your injuries, what you have tried and hated.
• They do a health screening questionnaire before training you. If they skip this, that tells you something.
• They have a written process for programmes, progress tracking and check-ins.
• They are specific about who they work with. Specialists are usually better than generalists for your particular goal.
• They give you a written programme you can follow between sessions.
• They take baseline measurements. A coach who does not baseline cannot show you progress later — see photos, measurements and the scale.
• Their terms and cancellation policy are in writing and offered upfront — see cancellation policies that are fair to both sides.
• They explain why, not just what. A coach whose aim is for you to eventually not need them is a good coach.
• They watch you and correct you rather than counting reps while looking at their phone.
• They are honest about uncertainty. "The evidence is mixed on that" is a mark of competence.

Warning signs

• They promise a specific result by a specific date. Nobody can.
• They sell you supplements. Particularly their own brand, or with a commission.
• They write you a meal plan. Outside scope for a personal trainer in most jurisdictions.
• They will not tell you their qualifications, or are vague about them.
• No health screening.
• High-pressure sales. A large block of sessions, today only, with a discount that expires.
• They comment on your body in a way that makes you uncomfortable.
• Their whole approach is punishment. Training as penance, extreme sessions to "shock" you, making beginners vomit.
• They dismiss your pain or tell you to push through it.
• They cannot explain why you are doing an exercise.
• They look at their phone during your session.
• Their clients all do identical programmes. Ask.
• They talk about their own training more than yours.

Matching the coach to your goal

Coaching is not generic, and the right coach for your neighbour may be wrong for you.

• Complete beginner: you want patience, clear teaching, and someone who will not overload you in week one. Ask how they handle beginners specifically.
• Returning after years off: similar, plus someone who takes your injury history seriously.
• Strength goals: find someone who lifts and coaches lifting. Ask about their own training.
• Fat loss: ask how they handle nutrition — and whether their answer respects their scope.
• Post-natal, pregnancy, older adults with conditions, injury history: these need specific qualifications. Ask directly.
• Sport-specific: find someone who has coached that sport.
• Limited time or awkward schedule: online coaching may suit you better than in-person — see what to expect from your first coaching session.

Practical matters

• Ask for a consultation before committing. Most coaches offer a free 20-minute conversation, and how they use it is informative.
• Do a small block first. Four to six sessions before a longer commitment. Be wary of pressure to buy fifty upfront.
• Understand the price and what it includes. Sessions only, or programming and check-ins between? These are very different services.
• Check the cancellation policy before you sign.
• Ask about session length and what happens if you are late.
• Ask how they store your health data. A reasonable question, and a coach who has thought about it is a coach who has thought about other things too.
• Read reviews, sceptically. Look for specifics and for how the coach responds to criticism.
• Trust your read on the person. You are going to spend an hour a week with them. Competence matters and so does whether you can stand them.

When to change coach

It is a service, and leaving is normal.

• You have made no progress in three months despite doing what was asked.
• They do not track anything, so nobody can tell whether it is working.
• Your programme has not changed in six months.
• They dismiss pain or concerns.
• You dread the sessions.
• They are frequently late, distracted, or cancel.
• You have outgrown them. A coach good for a beginner may not suit you two years later, and that is nobody's fault.

Give notice per your agreement, be polite, and pay what you owe. Most coaches are professional about it, and a good one may well recommend someone who suits you better.

Common questions

Do I need a personal trainer?

No, and one can compress months of learning into weeks — particularly for technique and for accountability.

What qualification should they have?

A recognised industry qualification for your country, named specifically. Level 3 PT or equivalent in the UK.

How much should it cost?

Varies enormously by market. Judge on what is included rather than the headline number.

How many sessions do I need?

Start with four to six to learn technique and a programme. Ongoing coaching is a separate decision.

What is the best question to ask a prospective coach?

"What is outside your scope, and who do you refer to?"

Should they write my meal plan?

No. General nutrition guidance is in scope; prescriptive meal plans are not.

Is online coaching a reasonable option?

Yes, for people with some experience or awkward schedules. Complete beginners usually benefit from some in-person work first.

How do I know if it is working?

You should be able to see logged progress in your lifts and measurements. If nothing is recorded, that is the problem.

The practical version

• Qualification and insurance are the minimum, not the differentiator.
• Judge on process: assessment, programme design, progress tracking, and honesty about scope.
• "What is outside your scope?" is the single most informative question you can ask.
• Good signs: health screening, written programmes, baseline measurements, explaining why.
• Warning signs: guaranteed results, selling supplements, meal plans, high-pressure sales, dismissing pain.
• Start with four to six sessions, and match the coach to your specific goal.