Southampton’s Premier, Bespoke Gym for 1-1 Coaching

Excuse-free, Flexible, First Class Fitness.

What’s it all about?

Fitness should be a part of your life, it shouldn’t rule it.

Are you looking to feel good and look great?

Do you wish you had the support of a fitness professional?

Would you rather skip the packed gym in favour of personal, targeted support?

And are you looking to train with the highest-spec equipment on the market?

Why do people love One21 Fitness?

Commercial gyms aren't for everyone

There’s no mystery that commercial gyms aren’t everyone’s cup of tea – fortunately you’re not alone.

Opening hours don't always suit your timetable

In this day and age, timetables need to be flexible. You need a fitness solution that can work around your busy lifestyle.

Contracts are annoying

We don’t want to tie you down, so we don’t tie you into any contracts.

It’s time to walk through the door at One21 Fitness

Hey, I’m Aaron, founder of One21 Fitness.

After a career in commercial gyms, I saw the same thing time and time again. I saw people, just like me, who didn’t actually love the gym environment… but still wanted to get fit, prioritise their health and achieve great results. 

That’s why I established One21. Work out your way, with support that’s tailored around you and slotted into your lifestyle.

No one-size-fits all, no templated workouts and no tied-in-commitments.

I was referred to Aaron by my physio after an injury caused by gym training,.

Initially I only intended a short course of PT sessions to learn better form. However, as I quickly realised, Aaron’s breadth of knowledge and commitment to highly tailored training was having such a positive impact that I carried on.

My motivation benefited hugely from the consistent results, but most importantly, I remained injury-free and haven’t needed physio since!

I continue to be impressed by Aaron’s dedication to ongoing professional development coupled with the use of the best equipment where needed, while not over-complicating exercises where it isn’t needed.


Here’s how we can get started today:

If you’re ready to work out once, twice or even three times a week, anytime between the hours of 7am and 7.30pm… then I’m here to train you.


Get in touch for a FREE no-obligation consultation

Let’s see if I’m just the right fit for you!

Choose the frequency and training slot that works for you

No cookie-cutter packages here!

Pay Monthly, With No Minimum Commitment

No one likes a phone contract, so let’s leave ‘locked in’ at the door.

Get Results With Your Bespoke Training Plan

Using state of the art equipment and confidence-boosting workouts!

One21 Fitness has made a huge impact on my life for the better.

I’ve been training with Aaron, the owner of One21 Fitness, for around 7 years now and the new gym only enhances the experience of training.

Aaron has helped me lose 3 stone for my wedding, when I was suffering with a back injury and didn’t think I’d be able to lose the weight.

He was able to adapt my training to my needs and capabilities at the time, meaning I was able to lose the weight I wanted.

I’m now able to do exercises and lift weights that I thought I’d never be able to do.

He is always expanding his knowledge by completing various courses, including how to safely train pregnant clients, which enables me to feel confident to train with him whilst pregnant.

The new gym allows me to train one to one with Aaron and not feel self conscious of others in the gym. The gym has all brand new high spec equipment which is easy to use with Aaron’s training technique,

Honestly one of the best decisions I’ve ever made was training with One21 Fitness.


I created One21 Fitness because I know you’re worth more than sacrificing your health and suffering with poor self-esteem. It’s time to ditch the belief that fitness simply isn’t for you.

Sure, you can download another app, YouTube another workout or skip another meal… but is it really getting you the results you want and the support you need?

I really enjoy my training with Aaron.

He is 100% focused and never fails to motivate and inspire me in every session. I cannot recommend his training methods highly enough.

I have been training with him for 2 years now and honestly, I have been making great progress with my strength level, correct techniques, posture and even my nutrition.

I’ve been losing more in terms of CM’s rather than KG’s – which was my aim!

He has his private gym with the latest gym equipment. He only trains one person at a time and basically, you have a whole gym for yourself to train, which is much safer during these COVID times.


Frequently Asked Questions:

I’m here to answer all of your questions. If you have anything else that you’d like to ask, then please get in touch

What are your opening hours?

You can book your sessions, subject to availability, between 7am and 7:30pm, Monday to Saturday.

How do I know this is right for me?

If you’re looking to build strength, get fit and improve your physical wellbeing, One21 is for you.

This isn’t an aesthetics first gym, I’m about real people getting real results and really improving their overall health.

Where are you based?

Waterloo Road, Southampton, SO15 3AQ.

I've never used a gym, does that matter?

Nope! I’ll be with you every step of the way, choosing exercises, equipment and stretches that suit your body and your unique goals. Come. as you are – I’ll handle the rest.

How often do I need to train?

The frequency of your sessions is really up to you, however, I would suggest at least one session per week in order to actually see results and make the most out of your investment with me. 

What's the minimum commitment?

Technically, there isn’t one! In order to keep your slot, I suggest booking and paying for your sessions a month in advance. But this isn’t a phone contract and you’re not locked in. No direct debits here!

I hate to say it, but…

For your every excuse, I have a solution:

I need expert equipmentI have that.

I can’t afford a PTIt’s flexible and affordable

I don’t have a goalYou don’t need one to become healthier

I’m too busy to work outI fit around you

I have work commitmentsI’m here early ’til late

I’ve had a PT before, it didn’t workI want to be the last PT you’ll ever need.

Want to learn more about training with us?

Click the button below to find out more about what training with One21Fitness looks like