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Sean - who has written 42 posts on Commando Conditioning.

Sean is an ex-Royal Marines Commando Physical Training Instructor (PTI) with numerous sports, exercise and fitness qualifications under his belt including; REPs (Register of Exercise Professionals) Advanced Instructor Level 3 (Fitness Manager and Personal Trainer), British Weight Lifting Association (BWLA) Coach, Kettle Bell Instructor, and SAQ (Speed Agility Quickness) diploma. Sean also has a BSc Honours degree in Molecular Genetics from King’s College London, and is a qualified teacher, with a Post Graduate Certificate in Education from the University of Plymouth. Sean has written a number of articles for various websites and is also the author of "the Royal Marines' Fitness Manual" Published by Haynes in 2009. Sean's personal sporting background includes martial arts, athletics/cross country, football, rugby, climbing and Parkour.

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