
Dr. Warren Brown
Doctorate degree from The School of Naturopathic Medicine at Bastyr University in Seattle
Nourish an athlete’s health and performance through an expansive way of integrative thinking.
An active individual has many extra nutritional requirements in order to achieve peak conditions. Therefore, in order to support optimal performance, we must consider their macro and micronutrient requirements for competitive gain, as well as the most appropriate fuelling strategies. In addition to these traditional teachings of sport and performance nutrition, within integrative sports nutrition we integrate a body systems approach to an athlete’s health, reminiscent of that found in the teachings of integrative and functional medicine, plus nutritional therapy.
We respect the interconnectivity of the body systems and incorporate this integrative thinking into our teaching. As such, we encourage our practitioners to promote optimal wellbeing with their clients: not just to maximise their performance for one race, one competition, or one season. But to perform well, for life.
Instead of focusing solely on performance and fuelling strategies, we always seek to build and restore health. We always ask ‘why’. We zoom out and look at the bigger picture. After all, health feeds performance is our central ethos.
As inferred, we take the words ‘balance’ and ‘individuality’ very seriously. Some of the common complaints we see in our athletes without the right support include adrenal fatigue, overtraining, chronic fatigue syndrome, autoimmunity, and even premature ageing. Therefore, we must help our athletes find balance within their individual dietary and lifestyle patterns if they are to avoid overtraining, and instead enjoy a long and healthy sporting career.
At CISN we believe that if a sportsperson is to achieve their performance goals, they firstly need to aspire towards optimal health. This foundation focus on personalised health is one of the primary factors that makes us different from other sports nutrition education providers.
Central to our attention is the individual and their environment. We don’t just follow a strategy that’s designed for the ‘average’ athlete, because we know that the people in our care are all outliers in one way or another!
CISN bridges the gap between two very separate disciplines: conventional sports nutrition, sometimes called performance nutrition, and the integrative, or functional, approach in nutrition and health.
We teach practitioners, who are working with athletes (elite and recreational), to focus on integrative and individualised health, which underpins our athletes’ physical, physiological, and psychological performance.
Above all, we want to give practitioners the skills, knowledge, confidence and tools to ensure the active individuals that they support experience better health and wellbeing, alongside their sporting performance.
In 2007 Ian Craig was asked to put together and deliver a postgraduate module called ‘The Competitive Athlete’ as part of the Centre for Nutrition Education and Lifestyle Management’s (CNELM) Masters degree.
At the time, he could not find a suitable textbook for the course, so he set about bringing together the principles from functional medicine and conventional sports nutrition teachings, and delivered his findings in a five-day course.
Since that time Ian has developed and delivered an exciting range of courses, edited the Functional Sports Nutrition magazine for 12 years, built up his own successful private clinic, and created and led several ‘functional’ sports conferences and courses, in the process becoming an expert leader in his field.
This career of integrative thinking and mentoring culminated in the launch of CISN in 2018, which has since diversified towards our current portfolio of courses.
We are delighted to welcome Professor Justin Roberts to the CISN expert teaching team. Justin is a leading expert in nutritional physiology, with over 25 years of experience in exercise, metabolism, gastrointestinal and performance research, so he brings a wealth of academic and applied expertise to the team. But he’s not just an expert in research; like most of the CISN team, he has spent several years as a personal trainer and nutrition practitioner, meaning that he is a master of translating science to practice!
Justin’s collaboration with CISN founder Ian Craig has already proven impactful. During their joint work on the Integrative Sport and Exercise Nutrition textbook, the partnership successfully bridged the gap between science and applied, personalised nutrition practice – an ethos that sits at the heart of CISN’s educational philosophy.
Justin’s new role marks an exciting step forward in delivering evidence-based practitioner-led education for the next generation of integrative nutrition professionals.

Exercise Physiologist & Nutritional Therapist

Exercise Physiologist & Sports Nutritionist

Nutritional Therapist and Researcher

Certified Natural Food Chef and Health Coach

Exercise Physiologist & Nutritional Therapist

Exercise Physiologist & Sports Nutritionist

Nutritional Therapist and Researcher

Certified Natural Food Chef and Health Coach

Digital Strategist, Automation & Integration

Doctorate degree from The School of Naturopathic Medicine at Bastyr University in Seattle

Leading sports dietitian with over 25 years of experience in clinical and performance nutrition

MSc in medicine, specialising in exercise physiology from the University of the Witwatersrand in Johannesburg, South Africa.

Clinical Sports Psychologist, with 20 years of experience of working with athletes of all ages to get more from life and sport

Master’s degree in Sport and Exercise Nutrition from Loughborough University, advanced training in Functional Medicine


Founder of Sacred Spiral Yoga, which is accredited with Yoga Alliance International.

Specialist performance nutritionist with over 25 years practical experience in elite sports.

Therapist, educator and author who uses somatic trauma therapy to release trapped emotional energy in the autonomic nervous system

Competed as a Masters Bodybuilder, becoming the British Champion and also winning a number of regional and international titles.

MSc in Psychology and Neuroscience of Mental Health from Kings, is a qualified Health Coach and NLP practitioner

Founder and CEO of Precision Fuel & Hydration (PF&H). As an elite triathlete in the early 2000s he really struggled when racing in the heat, eventually learning (the hard way

MSc in Personalised Nutrition, a Nutritional Therapy Practice Diploma, and a BSc in Sport and Exercise Science
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