The Full Story
About
Entire is an all-inclusive health and fitness service, bringing together like-minded people seeking improvements in health, fitness and lifestyle, whilst using professional expertise in coaching and nutrition to help others reach their full potential around their day-to-day lives.
Whether a Pro or complete novice, Entire aims to be the go to athletic community for all things performance, fitness and lifestyle
We want to make reaching goals an easier, achievable and enjoyable process through providing an effective, informed and genuine service.
Born out of friendship and a mutual love of elite performance - Entire is the story of two friends, athletes and competitors - Josh and Iestyn - who are determined to make coaching and performance accessible, inclusive and enjoyable for everyone.
Iestyn is the man with extensive triathlon experience, an incredible eye for detail, and who is on a never-ending pursuit of performance gains.
Josh is the Architect... literally, who turned pro triathlete. Using his creative instinct, he’s responsible for bringing Entire to life and reaching new audiences in order to encourage as many people as possible on their journey to a healthier, fitter lifestyle.
But they are only two parts of a bigger team - Entire is a network of professional, Commonwealth athletes who are sharing their journey and expertise.
It’s not just about bringing professional insights, but also providing the Entire community with the support, guidance and analytics necessary to achieve their personal performance goals.
Iestyn Harrett
After competing at the highest level of international triathlon for over a decade, Welsh triathlete Iestyn Harrett has announced his retirement from professional racing. He's now focusing his expertise in Triathlon on full-time coaching at the National Triathlon Performance Centre Wales (NTPCW) and Entire Performance Coaching.
A two-time Commonwealth Games representative and 2022 Commonwealth Games silver medallist in the Mixed Team Relay, Iestyn leaves behind an elite racing career defined by consistency, integrity, and results across every distance from super-sprint to 70.3. His standout performances include victory at Challenge Gran Canaria 70.3, multiple international podiums across Europe, and a BUCS Triathlon Championship title in 2019.
A Proven Track Record in Athlete Development
• 12 years competing as an international triathlete for Wales and Great Britain
• 2022 Commonwealth Games Mixed Team Relay Silver Medallist
• Winner of Challenge Gran Canaria 70.3 and multiple European Cup podiums
• Founder and Head Coach of Entire Performance Coaching
• Multiple world titles, podiums, and national records amongst coached athletes
• Cardiff Metropolitan University Performance Sport Ambassador and guest lecturer
Josh Lewis
Josh is a professional triathlete and coach based in Wales, with a lifelong background in elite sport. Having represented Guernsey at the 2018 and 2022 Commonwealth Games and finishing 5th at the Ironman 70.3 World Championships in 2023, Josh brings first-hand experience from the highest level of competition.
As both an athlete and architect by training, Josh takes a structured and data-informed approach to coaching, balancing performance metrics with practical, real-world application. His goal is to help athletes of all abilities train efficiently, race confidently, and achieve consistent long-term progress.
Josh believes the best coaching goes beyond numbers. It’s about understanding the person behind the athlete and creating an environment where learning, enjoyment, and performance all align.
A Proven Track Record in Athlete Development
• 7 years competing as an international triathlete for Guernsey and Great Britain
• 2023 Top 5 at Ironman 70.3 World Championships (3h 36mins)
• 2024 Second in the Long Course European Championships (7h 47mins)
• 2024 8th Challenge Roth
• Founder and Head Coach of Entire Performance Coaching
• Multiple world championship qualifications for coached athletes, Pb's across all distances/ disciplines, and numerous long-course first-time achievements.