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  • About
  • Consulting
  • Speaking
  • Testimonials
  • Resources
    • Media
    • Newsletter
    • Free Intro Course
    • Critical Speed Calculator

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I help coaches tailor training to speed, hybrid, and endurance profiles so their athletes get more from every session.

Join the weekly newsletter to get insights your squad can use straight from the field.

Access videos, visuals, and tools used by top teams and athletes around the world.

© 2025 Gareth Sandford Performance Inc. All rights reserved.

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    Vern Gambetta

    Vern Gambetta

    Athletic Development Coach and Founder

    GAIN Coaching Network

    Gareth delivered an exceptional masterclass to the GAIN community, focusing on anaerobic speed reserve and training science. His insights have played a vital role in enhancing our GAIN networks understanding of the relationship between speed and endurance. On a personal level, Gareth has been an invaluable resource for discussing training strategies for both individual and […]

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    Ruth Waghorn

    Ruth Waghorn

    Women’s Physical Performance Pathway Lead

    The English Football Association

    Gareth has been working with the FA and England teams for over four years, and one thing I can say for certain is that Gareth will make you think differently. When you want to grasp a concept, where do you turn? You seek someone who possesses both the knowledge and scientific foundation, but also applies […]

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    Jason Hettler

    Jason Hettler

    Assistant Head of Strength & Conditioning

    IMG Academy

    Gareth’s guidance has played a crucial role in transforming my approach to field and court sport conditioning. Our collaboration began with creating educational content for the sport performance community and expanded to include testing protocols, athlete profiling, and large group training. In the realm of tennis, we made significant strides by integrating anaerobic speed reserve […]

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    Peter Glas

    Peter Glas

    Head of Referee Fitness

    Swedish Football Federation

    When I first heard Gareth’s work on training prescription with anaerobic speed reserve, it was hard to digest because it was so culturally opposite to what I’d learnt about training. After 18 months of consultation with him, I have vastly transformed my thinking about individualizing training and aerobic conditioning. In a recent 12-week block with […]

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