"Dr. Impey's journey into the world of sports science began with his groundbreaking research into the cellular and molecular adaptations to exercise-nutrition interactions during his PhD and postdoctoral work. With over a decade of experience supporting elite athletes worldwide, Dr Impey has been helping Puresport develop their gels. They have said that 1 x 30g carb gel every 30 mins is as complicated as it needs to be. We chatted to Dr Impey to find out why, what the fat adaptation trend was all about, what negatives there are to too many gels, and whether you should adjust fuelling for your menstrual cycle.

Jo Wilkinson is England Athletics Regional Coach lead for Endurance in the South East and Talent Event Lead coach on the England Athletics Junior Talent Programme. She talks us through moving from top-club to elite athlete, reframing her ideas about coaching, what her coaching philosophy is and what she looks for when watching her athletes.

Jo has run all her life. She was coached by Alex and Rosemary Stanton (Paula Radcliffe's coach) and has a host of accolades to her name including:

• 6th in the 10000m at the Manchester Commonwealth Games 2002
• 2 x top 20 in the London Marathon elite field
• team bronze running for GB at the European Championships
• Having a daughter