Paul Laursen is adjunct professor and performance physiologist at AUT, he lead the Performance Physiology Team at High Performance Sport New Zealand for both the London and Rio Olympic cycles, and he coaches several elite triathletes. He is also the man behind HIIT Science (together with colleague Martin Bucheit). In his third appearance on That Triathlon Show, we dive even deeper into all things interval training for triathletes, and discuss practical programming applications.   IN THIS EPISODE YOU'LL LEARN ABOUT: What is the cost in terms of fatigue, recovery time, overall stress, and injury risk of various types of intervals? How do factors like age, sex, and athletic ability and experience influence interval training? Practical application of HIIT in triathlon programming - what would be some example training weeks for long- and short-course triathletes? The HIIT Science book and the course   SHOWNOTES: https://scientifictriathlon.com/tts163/   THAT TRIATHLON SHOW HOMEPAGE: www.thattriathlonshow.com   SPONSORS: Retül - Retül Bike Fit makes riding more enjoyable by making you more efficient while reducing the chance of injury and increasing comfort on the bike. It’s also more than just a bike fit - it’s a way to learn about your body, the root cause of your aches and pains, and how a proper fit will help you achieve your cycling goals.   LINKS AND RESOURCES: The Science and Application of High-Intensity Interval Training (HIIT) website The Book The Course Interval Training - Science and Application part 1 with Paul Laursen | EP#128 Interval Training - Science and Application part 2 with Paul Laursen | EP#129 Designing interval training: 10 things you have to know | EP#139 Designing interval training part 2: 10 MORE things you have to know | EP#146   RATE AND REVIEW: If you enjoy the show, please help me out by subscribing, rating and reviewing: www.scientifictriathlon.com/rate/   CONTACT: Want to send feedback, questions or just chat? Email me at mikael@scientifictriathlon.com or connect on Twitter - my handle is @SciTriat.