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SNR #221: Jordan Feigenbaum, MD - Why Doctors Should Be Recommending Resistance Training

Jordan Feigenbaum is an experienced strength coach who also has his medical degree and residency training. In addition to a veritable laundry list of credentials, Jordan is also an elite powerlifter. In This Episode We Discuss


SNR #220: James Krieger – Frequency, Volume and Calories for Strength & Hypertrophy

James Krieger is the founder of Weightology. He has a Master’s degree in Nutrition from the University of Florida and a second Master’s degree in Exercise Science from Washington State University. He is the former research director for a corporate weight management program that treated over 400 people per year, with an average weight loss of 40 pounds in 3 months. His former clients include the founder of Sylvan Learning Centers and The Little Gym, the vice president of Costco, and a former...


SNR #219: Arthur Lynch - How We Were Wrong, Mistakes Made & Lessons Learned

Arthur Lynch is a exercise physiology researcher currently pursuing his PhD at the University of Limerick. His current research focuses on the role of HMB supplementation on hypertrophy and strength performance in well-trained individuals. Arthur is an accomplished drug-free powerlifter, representing Ireland at the last two IPF World Championships and heading there again this year. He is current Irish Powerlifting Ferderation national champion in the -93kg class. Arthur coaches online here...


SNR #218: Powerlifting Insights: Tuchscherer, Nuckols, Helms, & More!

Some snippets of wisdom from past episodes of the Sigma Powerlifting Podcast. Insights from: Mike Tuchscherer, Eric Helms, Greg Nuckols, Rori Alter, Matt Gary and LS McClain. European Powerlifting Conference 2018 takes place in Dublin, Ireland on July 21st and 22nd. Tickets are on sale now from


SNR #217: Israel Halperin, PhD - Combat Sport Science, S&C Coaching & Motor Learning (Guest Hosted by Ciaran O' Regan)

Special guest host Ciaran O' Regan interviews Dr. Israel Halperin about research and application of S&C coaching. Israel is a post-doctoral researcher at Memorial University of Newfoundland. Israel completed his PhD at Edith-Cowan University, Australia in conjunction with the Australian Institute of Sport (AIS). His research centered on the effects coaching feedback has on the performance of resistance trained subjects and combat sport athletes. Israel spent the 3 years working with the...


SNR #216: Andy Morgan - Experiences & Philosophies of a World-Class Coach

Andy Morgan is back on the show to discuss a whole host of topics related to coaching, fitness and learning. Andy is the founder of and an online coach. He co-authored the Muscle & Strength Pyramids books along with Dr. Eric Helms and Andrea Valdez. He has published a host of excellent nutrition and training resources in the form of ebooks, articles and podcasts, which can be found on the Ripped Body website. Born in the UK, Andy has been living in Japan for over a decade,...


SNR #215: Andy Galpin, PhD - Science to Practice, Technology and Adaptation to Stress

Dr. Andy Galpin of CSU Fullerton talks about blending evidence and practice, as well as the potential beneficial and detrimental roles of technology for making training decisions. Andy is a tenured Professor in the Center for Sport Performance at CSU Fullerton. Andy spent 4 years studying the structure and function of human skeletal muscle at the single cell level, a feat which earned him a PhD in Human Bioenergetics in 2011. This also resulted in the friendship with frequent collaborator...


SNR #214: Marty Kendall - Optimising Nutrition Through Nutrient Density

Marty Kendall is the man behind the Optimising Nutrition blog and creator of the Nutrient Optimiser. On the show we discuss energy density, nutrient density and insulin load. To see if you qualify for a special life insurance quote due to being health conscious, then go to healthiq,com/sigma


SNR 213: Greg Potter - Chronobiology & Chrononutrition (Research Breakdown)

Greg Potter is currently just finishing up his PhD at the University of Leeds in the UK. His research focus on chronobiology; looking at circadian rhythms, light-dark cycles and the potential for meals to entrain peripheral circadian clocks. Two Research Papers Examined in this Episode: Paper One: Stothard et al., 2017 - Circadian Entrainment to the Natural Light-Dark Cycle across Seasons and the WeekendPaper Two:McHill et al., 2017 - Later circadian timing of food intake is associated...


SNR #212: Mike Zourdos, PhD - Drop Sets, Cardio for Lifters & Understanding Research as Conceptual

Michael (Mike) C. Zourdos, Ph.D, CSCS: Mike is an Assistant Professor in Exercise Science at Florida Atlantic University with a specialization in strength and conditioning and skeletal muscle physiology. He earned his Ph.D. in Exercise Physiology from The Florida State University (FSU) in 2012 under the guidance of Dr. Jeong-Su Kim. Prior to attending FSU Mike received his B.S. degree in Exercise Science from Marietta College and M.S. in Applied Health Physiology from Salisbury...


SNR #211: Brianna Stubbs, PhD - Ketogenesis, Metabolism and Ketone Ester Supplementation

Brianna Stubbs, PhD In 2016 Brianna completed her PhD in Metabolic Biochemistry at Oxford University. She also became a World Champion rower as part of the GB Rowing Lightweight Women's four person crew, and won 3 other World Rowing Championships medals. She has published peer-reviewed studies looking at ketone metabolism, ketone ester supplementation in athletes and effects of ketones on appetite. In This Episode We Discuss:


SNR #210: Prof. Tim Noakes & Martin MacDonald - Carbohydrate Intake, Insulin Resistance & Body Fat Regulation

Open discussion between Prof. Tim Noakes and Martin MacDonald on the topic of carbohydrates, insulin resistance and body fat. Prof Noakes obtained an MBChB degree in 1974, an MD in 1981 and a DSc (Med) in Exercise Science in 2002. In the early 90s, Noakes teamed up with Morné du Plessis to drive the founding of the Sports Science Institute of South Africa (SSISA). Prof Noakes has published more than 750 scientific books and articles. He has been cited more than 16,000 times in scientific...


SNR #209: Amy Bender, PhD - Sleep Better: Practical Evidence-Based Recommendations

Sleep researcher Dr. Amy Bender discusses the most current evidence-based recommendations for optimizing your sleep for health and athletic performance. Dr. Bender is the Clinical Program Director of Athlete Services at the Centre for Sleep & Human Performance and is also an adjunct professor of Kinesiology at the University of Calgary. She received her PhD and Master of Science degrees in Experimental Psychology from Washington State University in Spokane, WA specializing in sleep EEG....


SNR #208: Herman Pontzer, PhD - Constrained Energy Expenditure Model & the Evolutionary Biology of Energy Balance

Evoultionary biologist Dr. Herman Pontzer of Hunter College discusses the model of contrained energy expenditure and the metabolic adaptations that accompany high levels of physical activity. Dr. Pontzer is an associate professor at the Department of Anthropology, Hunter College & City University of New York. He is an evolutionary biologist with a PhD in Biological Anthropology from Harvard University. He has published seminal work in the area of energetics, including viewing human energy...


SNR #207: Alex Ritson - Research: Dynamic Fat Loss Rules & High vs. Low Reps

Alex Ritson is on the show to dive into two recent recent papers; one investigating the theories of dynamic fat loss models, and the other looking at the effect of low-rep vs. high-rep training for hypertrophy and strength. Papers Discussed in this Episode Paper 1: Silva et al., 2017 - Do Dynamic Fat and Fat-Free Mass Changes follow Theoretical Driven Rules in Athletes? Paper 2: Morton et al., 2016 - Neither load nor systemic hormones determine resistance training-mediated hypertrophy...


SNR #206: Alessandro Ferretti - Blood Glucose, HRV & Inflammatory Response to Diet

Nutritionist Alessandro Ferretti discusses data he has collected that may inform us as to the inflammatory response to diet and lifestyle, using markers such as blood glucose, heart rate variability and Alessandro's metric of "HRV/BG Index".


SNR #205: Brandon Roberts, PhD - Muscle Physiology & Bodybuilding Case Study (Research Breakdown)

Brandon has a PhD in Muscle Biology and is currently a Postdoctoral Fellow researching muscle physiology related to hypertrophic adaptations. He is a published author or peer-reviewed research. In addition to his prowess in academia, Brandon is well-respected and experience in the practical side of things; being a Certified Strength and Conditioning Specialist (CSCS), USA Weightlifting Sports Performance Coach and online coach for The Strength Guys. As a writer, Brandon has been published...


SNR #204: Greg Nuckols - Research Breakdown: Concurrent Training & Fat Free Mass Index

More Greg Nuckols is on the show to review two recent research papers; one looking at concurrent training and the interference effect, and the other looking at the fat-free mass index in athletes. Greg Nuckols is the founder of, a website that provides comprehensive information about how to get stronger and more jacked. Greg has over a decade of experience under the bar, and a BS in Exercise and Sports Science. He’s held 3 all-time world records...


SNR #203: Arthur Lynch - FFM for Strength & HMB vs. Leucine

Arthur is an exercise physiology PhD researcher and international-level competitive lifter in the IPF. He is head powerlifting coach at Sigma Nutrition. His current research is based on HMB supplementation and anabolism. Research Papers Discussed In This Episode: Study #1: Brechue & Abe, 2002 - The role of FFM accumulation and skeletal muscle architecture in powerlifting performanceStudy #2: Wilkinson et al., 2013 - Effects of leucine and its metabolite β-hydroxy-β-methylbutyrate on...


SNR #202: Andrea Valdez: Insights About Coaching, Training & the Fitness Industry

Andrea Valdez has been an athlete her entire life. As a former competitive gymnast and long-time coach in the sport, she developed a discipline and respect for the powers that strong minds and bodies can achieve. This led her to continued success in competitive cheerleading and bodybuilding throughout her journey in higher level education. She received a Kinesiology degree from Texas A&M University-Corpus Christi with an emphasis in Sports Management and a Minor in Business...


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