NEW ADDRESS: Brennan's Gym at Carterton South Industrial Estate, where you can join our intense HIIT classes and experience the best of Brennan Boxing.

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Brennan Boxing

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Harriet Brennan @ Brennan's Gym

My Philosophy

My Qualifications

Training With Me

My priority is always Client's happiness. Over the many years I have worked closely with individuals, it has become evident that happy people achieve their goals. Through guided self discovery, realistic exercise & nutrition targets & endless conversation & education, my aim is to build confidence, self esteem and a lifestyle that my Clients feel positive & proud about. 

Training With Me

My Qualifications

Training With Me

I deliver a variety of training options, including boxing fitness, strength and conditioning, circuit sessions and everything in between. 


Services include in person 1:1s, remote coaching & independent training plans. Client's see optimal results combining in person training with me with the daily support in my app. 


The best type of exerci

I deliver a variety of training options, including boxing fitness, strength and conditioning, circuit sessions and everything in between. 


Services include in person 1:1s, remote coaching & independent training plans. Client's see optimal results combining in person training with me with the daily support in my app. 


The best type of exercise is one you enjoy & keep up! I guarantee we will see results!

My Qualifications

My Qualifications

My Qualifications

I am a L3 Qualified Personal Trainer & a L2 Qualified England Boxing Coach. 

HB Online Coaching

I have successfully guided 100s of women over 30 years old to losing 20-80lbs + overhauling their lifestyle. 


Whether you're looking for complete accountability or simply want a clear plan to follow at your own pace, I have an option to suit you.

Contact Harriet

Full Coaching

My premium coaching programme is for women who want personalised support, accountability and guidance every step of the way.


Together we'll create a plan that fits your lifestyle, with tailored nutrition and training, regular check-ins, progress reviews and ongoing support to help you build habits that last. 


You'll have access to my coaching app, direct feedback, and a coach in your corner to help you navigate the challenges that inevitably come up.


If you're ready to stop starting over and finally make sustainable progress, this is the programme for you.

The Blueprint

The Blueprint is our complete step-by-step weight loss and strength guide, designed to help you understand exactly what to do and why it works.


For £27, you'll receive the full digital programme covering nutrition, calorie deficits, strength training, habits, mindset and long-term success, allowing you to work through everything in your own time.


This option is perfect if you're happy to work independently. So many women have seen incredible results using The Blueprint!


You can buy The Blueprint here!

The Blueprint + Accountability

Want a little more support without committing to Full Coaching?


The Blueprint + Accountability combines the complete Blueprint with access to my coaching app. 


You'll receive your workouts, habit tracking, progress monitoring and all of your programme content in one place, making it easier to stay organised, stay consistent and see your progress over time.


I can keep an eye on you completing what you're meant to do each day but without the analysis + personalisation that comes with Full Coaching.


It's the perfect middle ground if you'd like more structure and accountability while still working independently.


You can sign up here!

Welcome To HB Online Coaching

See who I am, who I work with + whether I am the right fit for you.

Welcome to The Barn Boxing @ Brennan's Gym

Pricing

These costings are correct as of July 2026


Contact Harriet to discuss your needs if you're not sure which option is right for you.

HB Online Coaching

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The Barn Boxing @ Brennan's Gym

OX18 3EZ, Carterton, Oxfordshire, England, United Kingdom

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