Our Founders

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Major Andrew Crockett


Dr Andrew Crockett graduated in both Medicine and Physiology from Guy’s, King’s and St Thomas’s medical school in 2006 with a special interest in altitude medicine and extreme environmental effects on the human body.


He has attained Membership of the Royal College of Surgeons, Diploma in Otorhinolaryngology and Head and Neck Surgery and a Master’s in Science from University College London. He has also trained in diagnostic and interventional radiology prior to training as a GP. He works as a doctor in the British Army having passed the elite selection as a paratrooper. This role has seen him command, train and provide medical support to those attempting selection into the most coveted brigade in the British Army, the Airborne Forces.


He has represented Great Britain in Alpine Skiing and Rowing and the British Armed forces in Ski-Mountaineering, he has held national titles in Kung Fu and is currently training for the Jungfrau marathon, one of the world’s most challenging uphill marathons.


His life has been shaped by personal tragedy following the death of his younger brother to cancer, which allowed him to experience disease from a patient’s point of view and reconsider the supportive measures patients may require through both acute and chronic disease. It was the loss of one so young to cancer which sparked Andrew’s interest in wellness and longevity.


Personal life experiences, his past and present involvement in elite sport and military training and his passion for precision performance medicine all combine to put him in a unique position to help patients optimise their health and performance to achieve their maximum potential.

Dr Ranulf Crooke


Dr Ranulf Crooke was awarded his medical degree from Guy's, King's and St Thomas' Medical School in 2007, gaining a distinction in Clinical Sciences. Prior to this he undertook his first degree in physiology.

He attained his Membership of the Royal College of General Practitioners and subsequently a Masters in Sports and Exercise Medicine with merit at the University of Bath, researching initially the effects of high-intensity interval training on patients with prostate cancer and, latterly, the effects of physical activity on cognitive function. He has also worked in the Cotswolds as a General Practitioner for the last decade and during this time also worked in sports medicine and NHS musculoskeletal clinics.

Combining his previous experience rowing internationally and his clinical interests in the applied science of longevity, he explores strategies to help people improve their health and well-being and ultimately their lifespan. Through the application of the science of human physiology Dr Crooke believes in helping people achieve their best through optimising their bodily movement, sleep, stress, nutrition, environment and lifestyle.

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Our Partners

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Craig Paterson

PgCert BSc (Hons)

Craig is an exercise physiologist and PhD researcher at the University of Gloucestershire. He is the University of Gloucestershire Performance Lab Lead and is director of cardiometabolic testing at Crockett and Crooke.


In his role with the University of Gloucestershire Performance Lab, Craig has worked with a broad array of individuals ranging from recreational athletes to Olympians giving him a well-rounded knowledge of human physiology as it pertains to performance. Outside the performance setting, Craig’s primary research area is the cardiometabolic consequences of sedentary behaviour; a field in which he has published numerous peer-reviewed journal articles.


By combining knowledge from both the worlds of performance and cardiometabolic health, Craig is able to offer a well-rounded approach to cardiometabolic testing and offer valuable insights into the resulting data.