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Sigma Nutrition Radio: Evidence-Based Nutrition | Fitness | Health | Dietetics | Body Composition

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Sigma Nutrition Radio provides unbiased, evidence-based information on nutrition and related areas through interviews with academic researchers, world-class coaches and athletes.

Sigma Nutrition Radio provides unbiased, evidence-based information on nutrition and related areas through interviews with academic researchers, world-class coaches and athletes.
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Sigma Nutrition Radio provides unbiased, evidence-based information on nutrition and related areas through interviews with academic researchers, world-class coaches and athletes.




#290: Menno Henselmans & Eric Helms, PhD - Diet Breaks, Calorie Cycling & Muscle Retention

In This Episode We Discuss: 1) How low is “too low” for low calorie days?; 2) How much do very low calorie days or fasting impact muscle retention?; 3) Is there a physiological benefit to diet breaks and refeeds? Eric is currently a Research Fellow at Auckland University of Technology, New Zealand. His work is focused on training and nutrition interventions that could have implications for bodybuilders, powerlifters and other strength athletes. Eric has many peer reviewed publications and...


#289 Ciaran Fairman, PhD – Exercise Interventions in Cancer Treatment

Ciaran is a post-doc research fellow at the Exercise Medicine Research Institute (EMRI) at Edith Cowan University in Western Australia. Ciaran completed his PhD in the Exercise and Behavioral Medicine Laboratory at The Ohio State University under the mentorship of Dr. Brian Focht. Here, his research focused on the physiological and psychosocial responses to physical activity lifestyle interventions in a variety of clinical populations including breast and prostate cancer, and individuals...


#288: Ted Ryce: Meditation, Communication & Understanding Behaviours

Ted is an online coach and podcaster. He has been in the fitness industry for over 20 years, with much of that spent as a sought-after personal trainer in Miami, Florida. During his coaching career he has worked with a variety of clients including Fortune 500 CEOs and celebrities, including Richard Branson and Robert Downey Jr. In more recent years he has continued to coach people online whilst being based in several different locations around the world. Show notes:...


#287: Gregg Slater - Dietary Fatigue, Nutrition Periodization & the Deficit-Adherence Model

Gregg Slater is head of education at Lift The Bar, a company providing education to fitness professionals. After completing his BSc in Sports and Exercise Science Gregg started out his professional life as a Physical Education Teacher before making the transition towards his passion for fitness as a Physical Training Instructor in the Royal Air Force for 10 years. In 2015 he took up his role as Head of Education for Lift The Bar. Over this time Gregg has designed a number of acclaimed...


#286: James Morton, PhD - Fuelling Elite Sport: Team Sky, Liverpool FC & Carbohydrate Periodization

Dr. James Morton is a Professor of Exercise Metabolism at Liverpool John Moores University. He has an extensive list of published peer-review research in high impact journals, as well as being deeply involved in the highly-regarded sport science and nutrition programs at LJMU. James was Head of Nutrition at Team Sky (now Team Ineos) during a period where the team captured 5 Tour de France titles. Previously, Dr. Morton worked as head performance nutritionist at Liverpool Football Club. He...


#285: What is Health? A Conceptual Framework

Intro to Danny’s framework for defining “health”: 1) Physical Reality – 06.30; 2) Contentedness – 14.08; 3) Psychological Framework – 31.37 DUBLIN SEMINAR: SHOW NOTES:


#284: Simone Harding – Tackling Negative Body Image & Weight Stigma

Simone is an Intuitive Eating Counsellor, currently finishing MSc Nutrition and Behaviour at Bournemouth University. She is also a PhD Counselling psychology candidate. Her academic research area is body image and adaptive eating, and she practices as a therapist in the field of nutrition, chronic dieting, body image and eating disorders. In This Episode We Discuss The scale of the problem of negative body image Tying appearance to self-worth & personal identity External drivers of...


#283: Alun Williams, PhD - The Genetics & Science Behind the Historic Caster Semenya/IAAF Case

Dr. Williams is the Director of the Sports Genomics Laboratory and is a Reader in Sport and Exercise Genomics at Manchester Metropolitan University. Alun is also Honorary Senior Research Associate at University College London. He has a PhD from the University of Birmingham. He has published expert position statements about the ethics and practicality of applying genetic technologies in sport. And was recently involved in the historic IAAF vs. Caster Semenya case related to testosterone...


#282: Louise Burke, PhD - Project Supernova: The Science of Fuelling Elite Athletes

Professor Louise Burke has been one of the most highly respected and accomplished sports nutrition researchers over several decades. She has been the head of sports nutrition at the Australian Institute of Sport (AIS) for nearly 30 years, publishing a vast number of important, novel and high-quality papers in the sports nutrition field. Professor Bourke’s research interests lie in nutritional intervention strategies for sporting performance. The goal of Louise’s research is to find...


SNR #281: Jake Linardon, PhD – Eating Disorders, Binge Eating & Body Image

Dr. Jake Linardon is a Lecturer in Psychology at Deakin University, Melbourne Australia. He started working at Deakin in 2018, shortly finishing his PhD at Australian Catholic University (2017). He continues to research into eating disorders, with a primary focus on testing and evaluating a broad range of treatment approaches for eating disorders. SHOW NOTES:


SNR #280: Kirsty Elliot-Sale, PhD – Energy Availability, Menstrual Disorders & RED-S

Dr Elliott-Sale is an associate professor in female physiology at Nottingham Trent University. There, she is also the Head of the Musculoskeletal Physiology Research Group. She is also responsible for teaching on the undergraduate and postgraduate Sport Science degree programmes. Dr Elliott-Sale teaches mainly in the areas of Exercise Physiology and particularly in Female Physiology, Performance, and Health. In This Episode We Discuss: --> Menstrual disorders: secondary amenorrhea (loss...


SNR #279: Avrum Bluming, MD & Carol Tavris, PhD – Estrogen, Menopause & Misconceptions About Hormone Replacement

Avrum Bluming received his MD from the Columbia College of Physicians and Surgeons. He spent four years as a senior investigator for the National Cancer Institute and for two of those years was director of the Lymphoma Treatment Center in Kampala, Uganda. He organized the first study of lumpectomy for the treatment of breast cancer in Southern California in 1978, and for more than two decades he has been studying the benefits and risks of hormone replacement therapy administered to women...


SNR #278: Jackson Peos – The ICECAP Trial, Intermittent Energy Restriction & the Science of Diet Breaks

Jackson is currently completing his PhD at the University of Western Australia in Perth. He is currently running the largest dieting study ever done on athletes in Australia. This research called the ICECAP trial (Intermittent versus Continuous Energy restriction Compared in an Athlete Population), looks at the effect of including a “diet break” week after every 3 weeks of dieting, compared to a continuous hypocaloric diet for the duration of the full dieting period. In This Episode We...


SNR #277: Eric Helms, PhD - Non-Quantitative Dieting, Personal Experiments & Optimal Weight Gain for Hypertrophy

Eric is currently a Research Fellow at Auckland University of Technology, New Zealand. His work is focused on training and nutrition interventions that could have implications for bodybuilders, powerlifters and other strength athletes. Eric has many peer reviewed publications and currently has many ongoing research projects and collaborations. Previously, Eric completed his PhD at AUT. He also holds a BS in fitness and wellness, an MS in exercise science, and a MPhil in sports...


SNR #276: Nick Gant, PhD - Neurometabolism: Brain Function, Fatigue & Nutritient Interventions

Nick Gant is Director of the Exercise Neurometabolism Laboratory at the University of Auckland. His group uses interdisciplinary approaches from the nutritional sciences and neurosciences to investigate the role of nutrition in brain health and performance. Nick is particularly interested in foods and supplements that prevent brain fatigue and improve physical and cognitive function. His research is currently funded by the Royal Society of New Zealand, the Health Research Council of New...


SNR #275: Kate Solovieva - Psychology, Empathy & Coping Strategies for Better Coaching

Kate has both undergraduate and graduate degrees in Psychology and spent time as a psychology professor at a college and university level. She currently is a health & nutrition coach, working for Precision Nutrition, where she has coached over 1,000 people. Now she coaches fitness professionals on how to be better coaches. In This Episode We Discuss: --> Using an understanding of human psychology to improve coaching outcomes --> How we go about rationalizing our behaviour. --> How...


SNR #274: James Lindsay, PhD - When Peer-Review Goes Wrong: Lessons From the Grievance Studies Affair

James A. Lindsay holds degrees in physics and mathematics, with a doctorate in the latter. His previous books include Dot, Dot, Dot: Infinity Plus God Equals Folly and Life in Light of Death. He has been in the news for submitting, along with Peter Boghossian and Helen Pluckrose, a series of hoax papers to peer-review (seven of which were published) in fields that categorise as “grievance studies”. SHOW NOTES:


SNR #273: Bryan Chung, MD, PhD – Dealing with Science Overwhelm & Improving Your Relationship with Research

Bryan Chung is a plastic/hand surgeon and PhD research designer. He is a methodologist who improves people’s relationship with science. In This Episode We Discuss: --> Bryan’s advice column for people who have “relationship problems with Science” --> If things merely confirm what you are already doing, why you should filter it out --> How to determine what is practically meaningful from a study --> The importance of establishing what the research question is --> How to deal with the...


SNR #272: Barbora de Courten, PhD – Effect of Carnosine on Glucose Metabolism and Chronic Disease Risk

Professor Barbora de Courten, MD PhD FRACP MPH is a Professor at Monash University, Australia. She is a National Heart Foundation Future Leader Fellow and a specialist physician with a PhD in epidemiology, extensive training in clinical trials (NIH) and a Master of Public Health (Monash University). She has expertise across the translational research continuum from epidemiology, human mechanistic studies to clinical trials and public health interventions through to practice. She is...


SNR #271: Prof. John Hawley – Circadian Metabolomics & Time-Restricted Feeding

Prof. Hawley is Director of the Mary MacKillop Institute for Health at Australian Catholic Universtiy in Melbourne, Australia. He has published over 220 scientific manuscripts, written over 100 articles for technical journals and has authored numerous book chapters for exercise biochemistry and sports medicine texts. He is an Associate Editor for Diabetologia and currently sits on the Editorial Boards of many international journals. He is a frequently invited speaker at both National and...