This episode I speak with Tim Kettering.  Tim Kettenring is a human performance coach and rehab specialist with extensive experience at every level of sport, from developmental to professional, as well as the general population. Tim is the President and Director of Performance for Maverick Human Performance which provides coaching, consulting and education services to coaches, competitive athletes, and everyday athletes around the world.  Tim is widely recognized as a subject matter expert on energy system development for athletes.   On this episode we discuss: Tim's background? What Tim has learned from coaching Rugby Tim's biggest influences We talk energy system development - assessment and prescription Anaerobic vs aerobic vs hydrid subtypes  Aerobic vs alactic development Supplements to aid energy system development This was a great discussion with Tim and I hope you all enjoy it.   Show Notes: Website - maverickhumanperformance.com   Books mentioned: Ultimate MMA conditioning  Science of Sports Training   People and resources Mentioned: Andy Galpin Kevin Mulcahy Gareth Sandford Joel Jamieson Dave Tenney Boo Schexnayder Chidi Enyia Vern Gambetta Jorge Carvajal Eddie Lee Ian Gibbons Mark Bennett Robert Wright  Pavel Tsatsouline  Yuri Verkhoshanksy George Brooks] Stephen Sieler Charlie Francis  Tim Gabbett James Smith Jonas Dodoo Stu McMillan Dan Pfaff ALTIS Thomas Kurz Jeremy Frisch  Arthur Lydiard Percy Cerutty  AV Hill James Morton James Moran Iñigo San Millán Dan Baker Martin Gibala Mark Uyeyama  Denis Logan St. Mary's University Twickenham - MSc strength and conditioning Dan John Steve Magness Elliott Richardson  Rich Clarke Dan Howells