Welcome to TJ Fitness Coaching Tailored Coaching to Optimise Your Performance
​At TJ Fitness Coaching, we specialize in personalized coaching programs designed to help you achieve your highest potential, whether you're training for your next sporting event or striving for a powerful body transformation our expert coaches can help you!
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We work with athletes of all levels, from weekend warriors to competitive performers, combining science-based training methods, with personalized nutrition guidance, and ongoing support to help you achieve your goals.
Meet the Coach
Head Coach
Tom Mansfield
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Tom has a wide range of knowledge and experience in the gym and sports from playing rugby for many years to competing as a cyclist undertaking races in the British Cycling elite level calendar (including the infamous Tour series Crits) and other high profile races, more recently having transitioned into Triathlon. In 2024 he competed in both the half Iron and Full Ironman event distances. Along side this Tom has gained qualification into the GB age group teams in standard Duathlon and Cycling Grand Fondos.
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​With this race level experience and over 10 years in the fitness and coaching with a wide range of athletes, Tom is able to apply a range of techniques and knowledge in a personalised approach to help tailor your plan to meet your needs and help you achieve your goals. ​​
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Coaching Ethos;
'With a focus on you as the athlete, my ethos is to create truly personalised training plans with sessions that are designed to ensure you are able to become the best athlete you can and achieve you goals.'​
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Specialises in; Sport Specific Coaching (Triathlon/Ironman, Cycling, Running, Swimming), Strength and Conditioning, Body Transformation. ​
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Qualifications;​
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Level 3 Personal Trainer
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Endurance Sports Coaching Institute Qualified Endurance Sports Coach (Formerly Ironman U covering swim, bike & run)
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HYROX Foundation Coach (Race Ready)
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Coaching Achievements;
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World Standard Distance Duathlon championships 3rd place Male (Bronze medal in 35 – 40 year old age group 2024)
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World Standard Distance Duathlon championship 5th place Female (40–45-year-old age group 2024)
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2 x Qualifications for age group European Sprint distance duathlon championship in 2025
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1 x Age group win at Ironman 70.3 Porec (Croatia) and qualification of 70.3 world Championships 2025
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Men's relay team win 2024 Cotswolds 113, 70.3 distance triathlon
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GB age group qualification for European standard duathlon championships 2023 & 2024
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GB age group qualification for World Grand Fondo Championships 2017, 2019 & 2023
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What We Offer
Sport Specific Coaching
Having a coach isn't just for the elite, this is the perfect package for those with sports specific goals. Whether you are looking to get started out in endurance sport, your looking for that next marathon PB, to improve your cycling FTP and race craft, take on your first triathlon or sport event or you have any other sports specific training goals this is the option for you. Offering structured training to ensure you are getting fitter, faster and stronger to achieve your goals.
Basic Plan
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Initial consultation discussing training, lifestyle & goals
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Regular coach check in's (weekly and monthly)
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Personalised monthly plan adjusted weekly
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Training Peaks account with coach attached
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Training zones analysed, established and discussed​
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Training plan automatically synced to Garmin, Zwift, Phone app etc.
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Regular WhatsApp communication from your coach (client initiated)
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​Race/Competition advice and strategy (pacing, nutrition, positioning)
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Regular feedback and analysis of your training to ensure progression
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Cost £90 ​per month
Pro Plan
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Initial consultation discussing training, lifestyle & goals
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Regular coach check in's (daily, weekly and monthly)
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Personalised monthly plan adjusted as required
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Training Peaks account with coach attached
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Training zones analysed, established and discussed​
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Training plan automatically synced to Garmin, Zwift, Phone app etc.
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Unlimited WhatsApp communication
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Race/Competition advice and strategy (pacing, nutrition, positioning)
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Regular feedback and analysis of your training to ensure progression
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7 days a week support from you coach​
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Strength & Conditioning plan integrated into your training
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Nutrition advice and guidance
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Cost £130 ​per month
Online Personal Training
Online Personal Training benefits both beginners and seasoned gym-goers. Whether you’re starting out or looking to take your training to the next level. Our online personal training offers personalised sessions that cater to individual needs, strength, fitness, achieving weight loss and body composition changes, with all your progress tracked and monitored to ensure you achieve your goals and targets.
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If your looking for a specific strength and conditioning programme this is also the option for you.
Plan includes
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Initial consultation discussing training, lifestyle & goals
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Regular coach check in's (weekly and monthly)
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Personalised monthly plan with sessions tailored to your goals and availability
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Training Peaks account with coach attached
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Training bench marks established and progress monitored
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Training plan automatically synced to Phone app for use in the gym
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Regular WhatsApp communication (client initiated)
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7 days a week support from you coach​
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Nutrition advice and guidance
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Regular feedback and analysis of your training to ensure progression
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Cost £100 per month ​
Testimonials
James
Running
Tom has been an outstanding coach, that I have been training with since February 2025. I was focused on improving my running times. Tom possesses extensive knowledge about running and specifically about training effectively for the distances aligned with my goals.
He consistently provided training plans and adjusted them based on how I felt about the training.
Tom is always reachable, regardless of the issue—whether you need a callback to discuss your concerns in detail, a voice note, or a text message, he is there to support you throughout your journey.
I would highly recommend Tom to anyone, whether it's your first experience with a coach or if you are a seasoned athlete.
Hannah
Triathlete
I decided I wanted to do a 70.3, I had only been cycling for 6 month and I struggled to swim over 1km so I found Tom.
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Tom has been incredible !he has helped me to set realistic goals and a plan that allowed me to balance training, work and being a mum of two kids, pushing me to be my best but also reinforcing the importance of rest days and that actually missing a session because of life is ok.
We have regular check ins and adjust the plans depending on how I’m feeling.
I completed Swansea 70.3 and I’m already thinking about the next one. I would not have got to the start line without Tom so a massive thank you!
Paul
Running
I can’t thank my Tom enough for helping me not only recover from a hamstring injury but also successfully complete the London Marathon. When I first started working with him, I had already deferred my Marathon from 2024 to 2025 and was unsure I would make it let alone run any sort of distance again due to the lingering injury.
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However, Tom’s approach was both thoughtful and effective—combining injury rehabilitation with gradual, structured training that built my confidence and strength every step of the way.
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Tom’s expertise and encouragement were crucial in helping me push through tough moments.
If you're looking for a coach who genuinely cares about your success and knows how to get you there safely and effectively, look no further.
