Muscle oxygen saturation and iliac artery flow limitation with Jem Arnold | EP#358

That Triathlon Show

Mikael Eriksson

Health, Swimming, Endurancesports, Run, Cycling, Health & Fitness, Fitness, Ironman, Swim, Bike, Sports, Running, Sportscience, Triathlon

4.9 • 596 Ratings

🗓️ 3 October 2022

⏱️ 96 minutes

🔗️ Recording | iTunes | RSS

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Summary

Jem Arnold is a physiotherapist, coach and PhD student. Currently, his main research focus is investigating FLIA: blood flow limitation of the iliac artery, a condition that affects certain athletes even at the very elite level, sometimes with surgery as the end outcome. Jem is also very involved and knowledgeable in using NIRS (near-infrared spectroscopy) to measure muscle oxygen saturation (SmO2). We dive deep into how using NIRS and SmO2 can inform workout execution as well as training interventions and athlete profiling. IN THIS EPISODE YOU'LL LEARN ABOUT: -What is NIRS and what is muscle oxygen saturation? -The balance of oxygen delivery (to the capillaries surrounding muscle tissue - supply) and extraction (by the muscles from the capillaries - demand) -NIRS testing protocols, and how it relates (and does not relate) to oxygen uptake (VO2) and lactate measurments -Using NIRS to profile athletes -Using NIRS in high-intensity workouts to optimise interval execution -Blood flow limitation of the iliac artery (FLIA) - what is it, and what is its prevalence among athletes -Risk factors for FLIA -Current detection and diagnosis methods of FLIA, as well as treatment options -How Jem's research aims to find methods by which FLIA detection can be improved SHOWNOTES: https://scientifictriathlon.com/tts358/ SCIENTIFIC TRIATHLON AND THAT TRIATHLON SHOW WEBPAGE: www.scientifictriathlon.com/podcast/ SPONSORS: ROKA - Exceptional quality triathlon wetsuits, trisuits, swimskins, goggles, performance sunglasses as well as prescription eyeglasses and sunglasses. Online vision test for prescription updates and home try-on options available for eyeglasses. Ships from the US, UK and EU. Trusted by world-leading athletes such as Lucy Charles-Barclay, Javier Gómez Noya, Flora Duffy, Morgan Pearson, Summer Rappaport and others in triathlon, cycling, speed skating, and many more. Visit roka.com/tts for 20% off your order. ZEN8 - The ZEN8 Indoor Swim Trainer is a unique swim bench that allows you to improve technique, power, and swim training consistency. With the trainer you can do specific power and technique work, including working on your catch and your core activation, and it makes it easier to stay consistent even when you can't go to the pool. Get the special Zen8 x TTS bundle including the swim bench and a number of Zen8 training plans and on-demand workouts on zen8swimtrainer.com/tts. LINKS AND RESOURCES: Jem's Twitter, email, and his blog Sparecycles Muscle Oxygen Saturation (SmO2) with Roger Schmitz | EP#85 What types of intervals are most effective? A scientific analysis with Michael Rosenblat | EP#243 Applied triathlon science with Olav Aleksander Bu (Norwegian Triathlon Olympic team) | EP#264 Moxy - well-established NIRS device Train.Red - another NIRS device also used and recommended by Jem Comparing the Respiratory Compensation Point With Muscle Oxygen Saturation in Locomotor and Non-locomotor Muscles Using Wearable NIRS Spectroscopy During Whole-Body Exercise - Yogev et al. 2022 A longitudinal study on the interchangeable use of whole-body and local exercise thresholds in cycling - Caen et al. 2022 Thresholds, Constructs, and Confidence Intervals - blog post by Jem Why is there Two Different Moxy Monitor SmO2 Profiles? w/ Jem Arnold - UTH1 - Upside Strength Podcast Maxima MC self-check questionnaire for FLIA (flow limitation of the iliac artery) Short- and long-term results of operative iliac artery release in endurance athletes - van Hooff et al. 2022 Rejuvenated and recharged: Tayler Wiles eyeing return to the pro peloton after surgery - Velonews article Feature: Arterial disease and cycling - Velonews article Cyclists' Iliac Syndrome - Interest group - Facebook group Cyclist Alliance - List of international vascular specialists with experience in FLIA 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 Instagram, Facebook, or Twitter.

Transcript

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0:00.0	The Triathlon Show, 358.
0:05.0	Hey, hey, what's up everybody, and welcome back to another episode of That Triathlon Show, the podcast
0:23.6	presented by Scientific Triathlon.com. I'm our host Michael, and on today's episode, I'm into
0:29.1	Gem Arnold. Gem is a physiotherapist, a coach and a PhD student, where currently his research
0:34.9	focus is investigating blood flow limitation of the iliac artery,
0:39.0	which is a condition that is surprisingly common, even though it's not necessarily that much talked
0:43.8	about. So we will talk about that in the interview, but we'll also talk about nears, near infrared
0:49.4	spectroscopy, which can be used to measure muscle oxygen saturation which gem is very involved with and
0:56.6	knowledgeable in he uses that in his blood flow limitation research but also just in general
1:01.8	coaching and testing methods so we dive deep into how using nears and muscle oxygenation can
1:08.5	inform things like testing workout execution and so on and so forth.
1:13.3	The NIRS discussion, which is the first part of the interview and lasts for quite long, can seem
1:19.0	a bit technical at first.
1:20.5	I just have to warn you.
1:21.7	So a couple of things that can help you is, first of all, you don't have to understand exactly how the technology
1:28.8	works to understand the applications that we discuss a bit further into the interview.
1:34.4	And secondly, we do get two points in the discussion where we try to clarify things to make
1:38.5	sure everything is understandable.
1:40.1	I'm not sure whether the order that we discussed things in were necessarily absolutely ideal.
1:45.8	That's why I'm trying to make these notes here.
1:49.2	But one quick note to make here to make sure that you have kind of an overview perspective
1:54.6	of how things belong together is that Nears is the technology that is used to measure muscle oxygen saturation,
	...

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