One21 Fitness

One21 Fitness

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One21 Fitness is a fully private 1-2-1 Personal Training Gym at the heart of Southampton

30/07/2026

At One21 Fitness, we don’t expect you to fit your life around the gym.
We build your training around your life.
If a busy schedule has been holding you back, get in touch and let’s find an approach that works for you. And help you avoid the 6pm packed sardines rush in commercial gyms!

27/07/2026

The Prime Fitness Plate Loaded Chest Press allows us to adapt the movement to the individual, helping improve comfort, movement quality and muscle engagement.

With adjustable handle positions and a converging movement path, we can better match the exercise to the individual, creating a pressing pattern that feels more natural and comfortable.

It’s not about having expensive equipment for the sake of it, I pick out the best of the best so I have the tools to personalise every session and help every client move better.

24/07/2026

Strength training isn’t just about looking stronger. It’s about staying strong as we age.

For women of all ages, building strength *today* can help support bone health, muscle mass, confidence and independence for years to come.

Lucy understands that strength training is an investment in her future. The best time to invest in YOUR future health is today.

20/07/2026

Every piece of equipment in the gym has a purpose.

The Prime Fitness Lat Pulldown gives us more freedom to coach with greater precision. Independent handles and adjustable resistance profiles allow us to tailor the movement to the individual, helping clients move more naturally, improve muscle engagement and train comfortably.

True personalised training starts with personalised/adapted movement.

17/07/2026

Every exercise should have a purpose.
Marcus is preparing for an 11-month sailing expedition, so alongside building strength we’re also developing rotational strength, movement and control to better prepare him for the demands of sailing.
At one21fitness, you can absolutely guarantee that every single exercise, every workout, every progression is adapted for your individual life and your individual goals. No two persons goals are the same and so no two programmes are either.

13/07/2026

This machine allows us to adjust the resistance profile, matching the exercise to the individual rather than expecting every client to move the same way.
More adjustability means more opportunities to improve comfort, movement quality and muscle engagement.

04/03/2026

Really appreciate this kind of feedback.

Every client who walks through the door starts at a different point, so hearing that the process feels clear, supportive and effective is exactly what I aim for.

Thank you to this client for taking the time to share their experience.

If you have been on the fence about starting, send me a message and we can talk through how it would work for you.

SouthamptonBusiness

21/02/2026

Loved seeing this client’s progress over the past few months.

It is not always about big dramatic changes.

Sometimes it is just building confidence, enjoying the process and noticing how your body starts to feel stronger.

Grateful for every bit of feedback I get.

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Location

Telephone

Address


121a Shirley Road
Southampton
SO153FF

Opening Hours

Monday 7am - 7:30pm
Tuesday 7am - 7:30pm
Wednesday 7am - 7:30pm
Thursday 7am - 7:30pm
Friday 7am - 7:30pm
Saturday 7am - 12:30pm