In these hard, hard times we need to help each other and stand as ONE!



GB Fitness is an exercise & nutritional consultancy designed for anyone who seeks to improve their health, vitality, physique, performance, emotional happiness and more. From Rehabilitation to Elite Athletes, from bespoke Corporate Programs to clients with medical issues – GB Fitness has benefited people from all walks of life – and offers something for everyone.


Founder Cain Leathem has studied anatomy and physiology, massage, exercise prescription, nutrition, supplementation, clinical analysis, biomechanics, endocrinology, phlebotomy, DNA testing, N.L.P. and many related disciplines. He prides himself on the comprehensive range of academic studies that he has undertaken and utilised in his many years of practical experience.

Cain arranges for world renowned educators such as Umahro Cadogan (from Denmark) to teach his students the latest advances in health assessments and clinical testing, utilising labs around the globe. They have lectured together as far back as 2004 and were both key figures on the faculty of the Functional Sports Nutrition Academy.


These elite athletes are representative of only a small section of a wide ranging client base. Clients include business professionals such as doctors, CEOs, pharmacists and many health professionals…basically anyone who wants to ensure the very best quality in the advice that they seek and an unrivalled attention to detail.

“Cain has become my go to health encyclopaedia. Immensely knowledgeable and truly passionate about health, fitness and everything that encompasses. As an Olympic Athlete I have spent my life surrounded by the worlds best coaches, nutritionists and doctors but I challenge anyone to spend more than an hour with this man and not leave inspired and determined to be better than yesterday.”

Sarah Lindsay
Director of Roar Fitness

10 x British speed skating champion and 3 x Olympian

“Cain has exceptional knowledge of the health and fitness industry. On first meeting Cain I felt at ease with his down to earth approach. I sought Cain’s professional services after the recommendation of a friend. I was pleasantly surprised to see he had worked with many world class and elite athletes, this encouraged me as he believed in me from day one. It’s inspiring to have a coach that’s also trying to increase his own knowledge to better the education of his students. I feel very fortunate to have worked closely with Cain and achieve my goal, and becoming a Champion in my very first competitions. My nutrition knowledge and training has increased dramatically. I was that impressed with his teaching I participated in his personal training course. I would recommend his courses and coaching to anyone, there really is no one better.”

Jody Bradbury – 2 x Ms Figure Champion



Cain is also a Professional Speaker and speaks internationally on all matters of health and optimal being. His clients include executives and forward thinking leaders in business. As a senior member of the Royal Society of Medicine he is at the cutting edge of advancements and research in health, fitness and medicine. He encourages an attitude of:

“WE do today what others will do tomorrow!”

Cain Professional Speaking. This is at a European business education course in Croatia.

Cain Professional Speaking. This is at a European business education course in Croatia.

1. Drink Plenty Of Water

Water intake is drastically under-rated by most people. It is actually one of the most important aspects of your diet as it controls so many vital bodily functions including temperature regulation, nutrient uptake (including vital carbohydrate storage to fuel exercise), waste removal…all in all your sports performance, as well as physical appearance, depends on it! The body is actually around 60% water so get drinking…and tea, coffee, pop and alcohol don’t count as they are diuretic and actually remove water from the tissues where it is needed! Also consider the source and quality of your water…it is the major delivery medium of the vital gases that make up the vast majority of our body – hydrogen and oxygen.

2. Eat Frequent, Quality Meals

In order to deliver the required amounts of quality nutrients needed to keep the body growing and repairing (anabolic) and to fuel Optimal Health. Overloading by eating less frequent meals stresses the digestive system and jeopardises nutrient uptake. Remember that everything that you eat is important and as such you should want to absorb it. The saying “you are what you eat” fails to appreciate the importance of the complexities of digestion, absorption, circulation, assimilation, utilisation and then elimination. We should look to understand and maximise the efficiency of each and every process to feed the amazing machine that is the body.

3. Ensure That Your Protein Intake Is Adequate

When trying to optimise your health and your physique you may need to side with real-world results rather than with “science-backed” generic government recommendations. There have been studies to support the ongoing claims that raising protein intake = increased lean muscle tissue, faster metabolism, better fat loss and healthier skin, hair as well as functioning with a stronger immune system, better healing properties etc. So you will be stronger, perform better and look fantastic!

4. Eat Real Food

This does not include a quick pot noodle or a microwave wonder meal… If you are serious about your health then spend a little time in the kitchen the night before and pop a healthy meal, couple of snacks and some fresh vegetables or salad into a tupperware tub. Also by relying on supplements you will miss out on vital constituents of a healthy diet – including fibre, phytonutrients and variety.

5. Concentrate On Unrefined Complex Carbohydrates

High intakes of refined and processed foods are common in our modern western diet. This greatly reduces our intake of vital nutrients, the majority of which are removed during processing. As individuals we require all the nutrients that we can get, especially from our daily food intake. Eat more whole-foods rather than white rice, white bread and packet foods. Focus on the foods and in their natural form that we evolved with as a species.

6. Eat Pleanty Of Fibrous Carbohydrates

High fibrous vegetables not only deliver important fibre but also vitamins and minerals. Eat a variety as an accompaniment to meals and as a snack throughout the day, rather than sweets and biscuits! Vary the colours of produce to ensure an array of plant based phytonutrients and anti-oxidants.

7. Minimise Your Simple Carbohydrate Intake

Sugars have no place in a health-conscious diet. They suppress the immune system, act as a stimulant stressing the adrenal glands and cause an ensuing cortisol response (which is catabolic to muscle tissue), as well as secreting excess insulin that can lead to fat accumulation as well as many other associated problems. The last thing you want is to be all hyper and unfocused at the start of your training and then suffer the ensuing crash just as soon as you are warmed up.

8. Keep Your Workouts Focused On Your Goal

The purpose of your exercise regime is to stimulate muscle which in-turn, when given the right nutrients and rest, repairs and grows to compensate for the ongoing stress it receives. Overlong workout periods will result in amino acids (proteins) being utilised as an energy source, and these will come from catabolised muscle – a loss of muscle tissue is detrimental to your goals. Don’t neglect the importance of stretching for your mobility and range of movement. On top of this lots of walking is great for your heart and burns fat off (your optimum pace will vary according to genetics and conditioning)!

9. Use Quality, And Relevant, Supplements As Required

Modern living and intense/regular training raises the bodys’ demand for nutrients required for repair and growth, as well as the nutrients needed for the metabolism of the increased food intake. Extra nutrients are also required to boost the immune system, which is suppressed by intense exercise, and to act as anti-oxidants for the increased free-radical damage caused by exercise. We must learn to understand that the more we demand of ourselves the more we need to feed and support the amazingly complex biological machine that is the human body.

10. Employ A Professional

The above guidelines are an overview. Each of us is an individual, with genetic differences, personal aims and goals and as such it should be understood that there is no “one size fits all” advice. Each person should have an awareness of their own individuality – that their personal destination, be it aesthetic or performance based, is different from others and that indeed it may change as the journey takes place. A professional, that is relevant to that journey and destination of the client, needs to understand the need for continual assessment and action based on results. Seek out advisors that not only have proven knowledge on their topic but who recognise and empathise with the wonderful and unique person that you are. 

There are many more tips to enhance your training and results but if you follow these tips (especially number 10!) you will start to put all the pieces of the complex puzzle together, maybe the most important one of all is CONSISTENCY.

“Trainer of Trainers…and of Champions. With a level of knowledge of the human body and it’s potential that I have never seen equalled in my many years of travelling the world and competing at the very highest level, hence my little nickname for him … ‘The Professor!’.”

Super Star of body building and GB Fitness trained Personal Trainer Charles Clairmonte.

Super Star of body building and GB Fitness trained Personal Trainer Charles Clairmonte.

Charles Clairmonte – 4 X Mr Universe and ex I.F.B.B. Professional Bodybuilder

For more information contact Cain on

07961346461 or cain@gbfitness.com