#620 - Dr Jeff Rothschild

Jack Moody is hosting this week and we catch up on the racing and news from the weekend. IRONMAN change their World Champs age group qualification system. We give our thoughts. There’s a new triathlon and trail running event in Taupo! We tell you more about it. This week Dr. Jeff Rothschild discusses the role of beta-alanine in enhancing athletic performance, particularly for endurance athletes. He explains the mechanism of action, practical applications, dosage recommendations and safety considerations for using beta-alanine and its combination with other supplements like sodium bicarbonate. The conversation emphasizes the importance of consistent dosing and planning for optimal results in training and competition. (0:00:00) – Jack Moody is back hosting this week and we call in from Challenge Roth (0:07:11) – IRONMAN announce changes to their AG World Champs qualifying system (0:13:54) – Try Off Road Taupo (0:18:13) – Controversy at the IM703 European Champs in Sweden (0:21:44) – IRONMAN Swansea (0:24:46) – Race Ranger Pro Athlete data to be published post Challenge Roth event (0:27:28) – New Race Ranger app (0:31:43) – Challenge Roth race review (0:54:27) – Intro to Dr Jeff Rothschild and Beta Alanine (0:56:50) – Dr Jeff Rothschild on Beta Alanine LINKS: Follow Jack Moody on Instagram at https://www.instagram.com/jacktmoody/ Challenge Roth at https://www.challenge-roth.com/en/ Dr Jeff Rothschild at https://www.eatsleep.fit/about-me/ Try Off Road Taupo at https://www.tryoffroadtaupo.co.nz/ RaceRanger App at World Triathlon trials new RaceRanger Officiating App IRONMAN Swansea at https://www.ironman.com/races/im703-swansea

Jack Moody is hosting this week and we catch up on the racing and news from the weekend. Dr. Jeff Rothschild is back on the show and discusses the critical role of nutrition in athletic performance, focusing on the common mismatches between training and dietary intake. He emphasizes the importance of carbohydrates for training adaptation and the dual role of glycogen as both a fuel source and a signaling mechanism for the body. The discussion covers practical applications of nutrition, daily energy balance, and how athletes can use technology to optimize their dietary strategies. Dr. Rothschild also introduces a course designed to help athletes understand and implement effective nutrition strategies to enhance their performance without compromising their health. (0:00:00) – Jack Moody is back hosting this week (0:07:28) – Long Distance World Champs Pontevedra (0:11:56) – IM70.3 Nice (0:13:03) – T100 race moved from Las Vegas to Wollongong (0:17:30) – Pro IRONMAN Series rankings (0:22:55) – IRONMAN Frankfurt (0:43:25) – Testing carbohydrate oxidization rates (0:46:55) – Jeff Rothschild LINKS: Follow Jack Moody on Instagram at https://www.instagram.com/jacktmoody/ Hotel Jakob at https://www.hoteljakob.at/de/hotel Challenge Roth at https://www.challenge-roth.com/en/ IRONMAN Frankfurt at https://www.ironman.com/races/im-frankfurt Jeff Rothschild Course at https://www.udemy.com/course/carbohydrate-periodization-for-athletes/?couponCode=ST16MT230625B Link for course discount at https://www.udemy.com/course/carbohydrate-periodization-for-athletes/?couponCode=FITTER Calculating VO2 Max without a lab test at https://knowledgeiswatt.substack.com/p/70-calculating-vo2max-without-lab

We 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

We catch up on the racing and news from the weekend. We meet Chris Sturdevant, winner of the free race entry to IRONMAN 70.3 Sunshine Coast Dr Jeff Rothschild is back on the show and this week he talks about creatine. Jeff discusses the multifaceted benefits of creatine, including its impact on brain health, cardiovascular health and overall well-being. He emphasizes the importance of daily supplementation, dosage recommendations and dispels common myths surrounding creatine use. (0:00:00) – Tim calls in from Andorra. (0:07:03) – Racing at the weekend (0:12:04) - Chris Sturdevant (0:20:35) - Tri news and racing at the weekend (0:32:43) – IRONMAN Cairns race review (0:50:55) – Jeff Rothschild on Creatine LINKS: Dr Jeff Rothschild at https://www.eatsleep.fit/about-me/ Knowledge is Watt at https://www.knowledgeiswatt.com/

We catch up on the racing and news from the weekend. We bring Kiwi Professional Triathlete Kyle Smith back to the show after his recent 4th place at the T100 in San Francisco. Kyle reflects on his personal growth over the last few years plus the challenges he’s faced around health, particularly related to mould exposure and how these issues impacted his performance. We also discuss the evolution and changes in middle distance racing and the importance of maintaining the balance between training and adequate recovery during the pressures of a much longer racing season. The importance of perspective, the awareness of the risks of overtraining and the need for athletes to find their own path in a competitive environment are now key to athletic success. (0:00:00) - Tim’s in France so Jack Moody is hosting this week. (0:04:30) - Infinit Nutrition prize pack (0:06:38) - Plasmaide (0:12:28) - Jack’s code JACKM10 (0:13:08) - We review the racing from the weekend (0:29:07) - Kyle Smith (1:24:33) – Heat adaptation LINKS: Follow Jack Moody on Instagram at https://www.instagram.com/jacktmoody/ Follow Kyle Smith on Instagram at  https://www.instagram.com/kylesmithnzl/ Plasmaide at https://plasmaide.com.au/ Infinit Nutrition at https://www.infinitnutrition.com.au/ T100 Triathlon at https://t100triathlon.com/

We catch up on all the racing and news from the weekend. We bring Dr Jeff Rothschild of the Sports Performance Research Institute New Zealand (SPRINZ) back to the show to talk about the science behind fuelling for endurance sports. The discussion focuses on the daily energy requirements for athletes and the evolving perspectives on carbohydrate diets in endurance performance. We cover carbohydrate intake strategies, the science surrounding carbohydrate loading and the importance of electrolyte balance leading into events. Additionally, insights into current research perspectives in sports nutrition and the necessity of proper fueling for training are explored, emphasizing the need for athletes to understand their individual nutritional needs to maximize training outcomes. (0:03:18) – Tri news and race reviews (0:36:17) – Dr Jeff Rothschild LINKS: More about Jeff Rothschild at https://www.aut.ac.nz/student-profiles/jeff-rothschild

We catch up on all the racing and news from the weekend. Dr Michael Rosenblat completed a Doctor of Philosophy (PhD) in Exercise Science at The University of Toronto, a Master of Science (MSc) in Physiotherapy at McMaster University  and a Bachelor of Applied Science in Kinesiology at The University of Guelph. He is also a Clinical Exercise Physiologist with a Specialization in High Performance. In our chat with Dr. Michael Rosenblat we discuss his recent work on training intensity distribution and its impact on endurance performance. He reflects on his journey in sports science, the importance of statistical analysis and the need for collaboration in research. The conversation delves into the findings of a network meta-analysis that compares different training intensity models and their effects on VO2 max and time trial performance, highlighting the significance of individual participant data in drawing meaningful conclusions.  We discuss the relationship between coaching and sports science and explore the differences in training intensity requirements for recreational versus competitive athletes, the importance of periodization in training models and the nuances of VO2 peak and time trial performance. Additionally, the conversation delves into the significance of understanding thresholds in training and the need for further research in sports science to better inform coaching practices. (0:04:34) – Tri news and race reviews (0:09:39) – IM703 Sunshine Coast free race entry competition. (0:28:27) – Dr Michael Rosenblat LINKS: Our previous interview with Dr Rosenblat at https://www.fitter.co.nz/fitter-radio/2021/8/30/episode-383-dr-michael-rosenblat Which Training Intensity Distribution Intervention Will Produce the Greatest Improvements in Maximal Oxygen Uptake and Time-Trial Performance in Endurance Athletes? Study at https://pubmed.ncbi.nlm.nih.gov/39888556/ Effect of High-Intensity Interval Training Versus Sprint Interval Training on Time-Trial Performance: A Systematic Review and Meta-analysis. Study at  https://pubmed.ncbi.nlm.nih.gov/32034701/ More about Dr Rosenblat at https://www.evidencebasedcoaching.ca/ IM703 Sunshine Coast at https://www.ironman.com/races/im703-sunshine-coast

We catch up on all the racing and news from the weekend. We share an excerpt from the World Triathlon Podcast intervew with Alex Yee post his attempt to test himself over the marathon distance at the London Marathon. (0:01:50) – Bev joins Training Peaks Virtual (0:05:26) – We review all the racing from the weekend. (0:43:03) – Alex Yee – is there an IRONMAN in his future  (0:46:12) – Excerpt from the World Triathlon Podcast  (1:09.00) – Hayden Wilde update LINKS: World Triathlon Podcast with Alex Yee at https://triathlon.org/news/world-triathlon-podcast-with-alex-yee-marathon-man

We catch up on all the racing and news from IRONMAN 70.3 St George at the weekend. Bev chats to Steve Allende, Co-Founder and CEO of Plasmaide. We discuss the company's involvement in the triathlon community, particularly with elite athletes like Kristian Blummenfelt and Gustav Iden. Steve shares insights into the unique competition that Plasmaide are offering to age group athletes, which offers an opportunity to train with  Kristian and Gustav in Font Rumeu in France and receive physiological testing from Dr Alison Heather. The conversation highlights the benefits of Plasmaide's products, the importance of evidence-based supplements and the exciting future developments for the brand. (0:03:15) – Hayden Wilde injuries update (0:08:04) – Will Anne Haug be in Roth? (0:11:44) – IRONMAN 70.3 St George race review  (0:31:32) – Plasmaide competition (0:35:58) – Steve Allende of Plasmaide LINKS: Plasmaide at https://plasmaide.com.au/ Live Feisty podcast at https://livefeisty.com/podcasts/feistytriathlon/ironman-goes-backwards-special-world-champs-episode/ Plasmaide competition at  https://plasmaide.com.au/pages/prostrainingcomp

We catch up on the tri news and racing from the weekend and give our thoughts on the announcement that the IM World Champs is moving back to Kona. Alison Heather is a former academic professor whose research has focused for over 24 years’ on the physiology of steroid hormones and their role in health and disease. She has international recognition for her development of bioassays for the detection of steroid hormones. Alison acts as an advisor to many High Performance Sport Teams including those focusing on female athlete health, triathlon, cycling, running and sports supplements and is currently the Chief Scientific Officer for plasmaide In this conversation, we discuss the supplement Plasmaide, its origins and its benefits for athletes. Dr Heather explains the science behind nitric oxide production, the ingredients in Plasmaide and how it compares to other supplements like beetroot juice. The discussion covers both acute and chronic benefits of Plasmaide, its adaptogenic properties and its influence on carbohydrate metabolism. Dr. Heather also provides practical advice for using Plasmaide safely and effectively, emphasizing the importance of consulting with a healthcare professional before starting any new supplement regimen. (0:00:00) – A weekend of bike crashes (0:09:22) – T100 goes to the Gold Coast in 2026 (0:15:51) – The racing from IM703 Venice and IRONMAN Australia  (0:24:16) – IRONMAN World Champs moves back to Kona (0:40:05) – Dr Alison Heather intro (0:41:38) – Dr Alison Heather LINKS: Dr Alison Heather at https://www.insitugen.com/ Plasmaide at https://plasmaide.com.au/ Live Feisty podcast at https://livefeisty.com/podcasts/feistytriathlon/ironman-goes-backwards-special-world-champs-episode/ Pro Tri News podcast at https://protrinews.buzzsprout.com/1736374/episodes/17067560-episode-217-kona-is-back-with-ironman-ceo-scott-derue 2025 Oceania Triathlon Super-Sprint Championships Runaway Bay at  https://triathlon.org/events/2025-oceania-triathlon-super-sprint-championships-