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Brett Sizeland Coaching

Welcome To Sustainable Strength

Thank you for visiting my website! I'm Brett Sizeland, a former professional MMA fighter turned full-time coach.

After overcoming personal challenges, including caring for my twins with autism, I am dedicated to helping busy parents and individuals transform their fitness and health.

Explore my range of customised online coaching programmes designed to provide the accountability, support, and guidance you need to achieve sustainable results.

From personalised workout plans to nutrition advice and weekly check-ins, I'm are here to help you every step of the way.

🚀 Find Out More

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Brett’s honest approach to achieving your personal goals is a breath of fresh air. He keeps the training unique, it’s always challenging and frankly it works!

- Sonya Southern

Life gets in the way of training for me. So we work around that. I enjoy training now in a way I haven’t for years.

Ru Cameron

Training with Brett has had a massively positive impact on my performance. My strength has significantly increased. Moreover, skills improved, form and general endurance.

Maria Tait

Brett uses knowledge and expertise to create tailored plans to improve functional strength and fitness. He shares information freely to support his clients development and always manages to keep routines from being boring.

Gavin McCormick

have struggled for many years with a bad knee injury. Training regularly with Brett has meant that my knee is strong and the pain is much less. My all round fitness is the best it has been.

James Hall

Without Brett I wouldn’t have been able to reach my goals of building strength and overall resilience. His programmes work and his support is second to none.

Nicky Oliver

Brett’s honest approach to achieving your personal goals is a breath of fresh air. He keeps the training unique, it’s always challenging and frankly it works!

- Sonya Southern

Life gets in the way of training for me. So we work around that. I enjoy training now in a way I haven’t for years.

Ru Cameron

Training with Brett has had a massively positive impact on my performance. My strength has significantly increased. Moreover, skills improved, form and general endurance.

Maria Tait

Brett uses knowledge and expertise to create tailored plans to improve functional strength and fitness. He shares information freely to support his clients development and always manages to keep routines from being boring.

Gavin McCormick

have struggled for many years with a bad knee injury. Training regularly with Brett has meant that my knee is strong and the pain is much less. My all round fitness is the best it has been.

James Hall

Without Brett I wouldn’t have been able to reach my goals of building strength and overall resilience. His programmes work and his support is second to none.

Nicky Oliver

Brett’s honest approach to achieving your personal goals is a breath of fresh air. He keeps the training unique, it’s always challenging and frankly it works!

- Sonya Southern

Life gets in the way of training for me. So we work around that. I enjoy training now in a way I haven’t for years.

Ru Cameron

Training with Brett has had a massively positive impact on my performance. My strength has significantly increased. Moreover, skills improved, form and general endurance.

Maria Tait

Brett uses knowledge and expertise to create tailored plans to improve functional strength and fitness. He shares information freely to support his clients development and always manages to keep routines from being boring.

Gavin McCormick

have struggled for many years with a bad knee injury. Training regularly with Brett has meant that my knee is strong and the pain is much less. My all round fitness is the best it has been.

James Hall

Without Brett I wouldn’t have been able to reach my goals of building strength and overall resilience. His programmes work and his support is second to none.

Nicky Oliver