#623 - Relative Energy Deficiency: Lionel Sanders. Christine Byrne
Fitter Radio Triathlon Podcast
Release Date: 06/23/2025
Fitter Radio Triathlon Podcast
We chat about the racing from the Loan Market Half at the weekend including the incredible performances and the use of race ranger. We catch up with James Elvery from Race Ranger about the recent developments in drafting distance testing for triathlons, particularly in relation to IRONMAN events. He shares insights from recent tests where they experimented with different drafting distances, including 12 meters and 20 meters. James emphasizes the importance of accurate data collection and the feedback from athletes regarding their experiences with the Race Ranger system. The discussion also...
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The Loan Market Oceanside Mount Half use Race Ranger this weekend. Pro Tri News have put out a survey to collect feedback on the drafting zone rules – we discuss what we know so far. We chat to Dr Warren Bradley, Founder & CSO of Hytro - designers of the first Blood Flow Restriction (BFR) wearable, designed to improve sports performance. Blood Flow Restriction works by tightening a strap around the top of your arms or legs to lock blood in the muscles while you perform light exercise or recovery routines. This helps your muscles get stronger and recover faster than they would without...
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Jack Moody’s in the hot seat and we chat about the racing in NZ in the next few months and how the triathlon landscape might look for 2026. LINKS: Jack Moody on Instagram at Mount Festival of Sport at T100 at IRONMAN New Zealand at Procreate NZ at Race Ranger at Challenge Wanaka at
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Sam Shaw rode the 648km from Auckland to Wellington in a single day with the help of lots of bananas, gingernut biscuits, carrots and cans of Coke. He set a new record time for the solo ride, coming in at just over 17 hours - without a single stop along the way.
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We catch up on the racing and tri news from the weekend. The Triathlon World Tour will launch in 2027 and combine the existing T100 Triathlon World Tour, a rebranded World Triathlon Championship Series and World Triathlon Cups. The T100 Tour will be rebranded as the T100 World Championship Series At the recent One NZ GODZONE Adventure race Team RAB made up of Sophie Hart, Chris Forne, Simone Maier and Sam Clark were welcomed by a large crowd of friends, family and supporters as they crossed the line in first place. Team Captain Chris Forne described this latest Chapter 12 of the One NZ...
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Tim’s back and he fills us in on his epic adventures at Godzone. We catch up on all the racing and tri news from the weekend. Pete Pfitzinger is an American former distance runner - now exercise physiologist and author - who represented the United States in the marathon at two Olympic Games, in 1984 and 1988. He is also a highly respected coach and the co-author of the popular training book Advanced Marathoning. The latest (4th) edition of his book is now in full colour and includes the marathon training principles and training programs that thousands of...
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Jack steps into the hot seat to cover for Tim whilst he battles the GODZONE course! Sue Beattie won the free race entry to the Kosciusko 50K Ultra. We find out how it all went. We chat about the metabolic cost of swimming and the dangers of poor fueling. We have a free race entry to giveaway to the Loan Market Tauranga Half Oceanside. (0:00:00) – Tim at Godzone (0:03:39) – UTMB Kosciuszko (0:06:14) – Sue Beattie (0:19:29) – IRONMAN WA this weekend (0:23:07) – Swimming stress and the metabolic cost (0:53:21) – Loan Market Tauranga Half Oceanside LINKS: Godzone Adventure Race...
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Tim prepares for GODZONE. We catch up on the racing from the weekend plus we look ahead to the T100 Qatar start list. Meridith Cass is the Founder and CEO of Nix Biosensors, a company that develops wearable sensors to monitor hydration by measuring sweat. The Nix Biosensor provides real-time data on sweat loss, electrolyte loss, and sweat composition to help athletes and others optimize hydration for performance and health. In this conversation, Tim Brazier and Meridith Cass delve into the science of sweat and hydration, discussing the Nix Hydration Biosensor. They explore the importance of...
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Auckland-based professional triathlete Jack Moody broke the tape at the Queenstown Marathon in 2:25:02, posting a new men's course record by more than a minute. We chat to Jack about his race. IRONMAN make changes to their World Championship qualification system. Clare Fitzpatrick won a free race entry to the IRONMAN 70.3 in Melbourne. We find out how her day went. We catch up on the racing from the weekend including the race management issues arising from the T100 in Dubai. (0:06:06) – Jack Moody (0:03:07) – IRONMAN Arizona (0:25:48) – IRONMAN Qualification System (0:31:59) – Clare...
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We review the racing from the IRONMAN 70.3 World Champs at the weekend. We chat to Susan Phillips, winner of the free race entry to the Garmin Noosa Triathlon. (0:08:05) – Susan Phillips (0:03:07) – IRONMAN 70.3 World Champs Women’s race (0:27:49) – Women’s post race press conference (0:46:45) – IRONMAN 70.3 World Champs Men’s race (1:00:04) – Men’s post race press conference LINKS: Garmin Noosa Triathlon at IM703 Melbourne at IRONMAN 70.3 World Champs at
info_outlineWe catch up on the racing and news from the weekend.
Louise Saggers won the free race entry to IRONMAN Cairns. We found out how her day went.
We share Lionel Sander’s YouTube video which centres on his recent experiences with injuries, particularly stress fractures. Lionel tells us what he’s now learned about relative energy deficiency in athletes and the impact on hormonal health. Relative energy deficiency can significantly impact athletic performance and stress fractures are often linked to energy deficiencies. Nutrition plays a crucial role in recovery and overall health and understanding the importance of the body's energy needs is vital for performance.
Christine Byrne has a Masters in Public Health Nutrition and is a Registered Dietitian and Licensed Dietitian Nutritionist. We talk to her about her work as an ‘Anti Diet Dietitian’ and her article ‘Eating Healthy Might be Hurting Your Performance’. The conversation explores the complexities of eating disorders, particularly in the context of amateur sports and athletic performance. It highlights the spectrum of eating disorders, the rise of orthorexia and the importance of understanding the relationship between nutrition and performance. The discussion emphasizes that athletes often face unique challenges regarding caloric intake and the misconception of 'clean eating' which may hinder their performance.
(0:00:00) – Both Tim and Bev now in Europe
(0:02:20) – IRONMAN Les Sables race review
(0:05:58) – IM703 Western Sydney Race Entry Competition
(0:07:44) – Louise Saggers – IRONMAN Cairns
(0:25:55) – Lionel Sanders
(0:28:45) – Lionel’s YouTube audio
(0:57:48) – Christine Byrne
LINKS:
IRONMAN Cairns at https://www.ironman.com/races/im-cairns
IRONMAN Les Sables d’Olonne at https://www.ironman.com/races/im-les-sables-dolonne
IRONMAN 70.3 Western Sydney at https://www.ironman.com/races/im703-western-sydney
More about Christine Byrne at https://christinejbyrne.com/
Full Fitter Radio interview with Christine Byrne at https://www.fitter.co.nz/fitter-radio/2022/7/4/episode-427-christine-byrne
Lionel Sanders YouTube Channel at https://www.youtube.com/@Lionel.Sanders
Jeff Rothschild Course at https://www.udemy.com/course/carbohydrate-periodization-for-athletes/?couponCode=ST16MT230625B