Dr Nessan Costello is a high-performance sport nutrition consultant and senior lecturer at Leeds Beckett University, specialising in bridging cutting-edge science with real-world performance to unlock elite potential. He leads applied research across energy and fluid requirements, body composition, behaviour change, and performance nutrition coaching—supervising over ten applied PhD students and securing more than £600,000 in external funding to drive innovation in elite sport.
With over a decade of experience at the top level, Nessan has worked with leading clubs including Chelsea FC, Leeds United, and Newcastle United, and has supported World Cup winners, European champions, and international-standard athletes, performers, and executives. His approach combines scientific insight with practical application to deliver strategies that fuel, recover, and elevate KPI athletes to perform at their best when it matters most.
Work with KPI this Off-Season — either 1:1, in group coaching, or remotely — and take your game to the next level before Pre-Season begins.
