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/
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LINKS AND RESOURCES:
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CONTACT:
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Triathlon swimming with Conrad Goeringer and Rob Sleamaker | EP#255
Q&A #107 - Muscle Oxygen Saturation (SmO2) applications in endurance training
Bike Fitting Q&A with Phil Burt | EP#254
Q&A #106 - The menstrual cycle's impact on endurance training; Swimming and running drills; External and internal cues
Devices, apps, and technology for triathletes with Michael Liberzon, Andrew Buckrell and Mikael Eriksson | EP#253
Q&A #105 - Training and benchmark workouts for a first Ironman; Equipment for a first Ironman; Winter base training on the bike
Glycogen metabolism and optimising glycogen resynthesis with Bob Murray, PhD | EP#252
Q&A #104 - Walking as an alternative to low-intensity running (pros and cons); What training is recommended to when one has a poor anaerobic threshold relative to VO2max?
Training talk with cycling coach James Spragg | EP#251
Q&A #103 - Differences in bike power indoors and outdoors; Supplements for endurance athletes
How World Tour cyclists train, and a discussion on training load with Teun van Erp, PhD | EP#250
Q&A #102 - Ironman run training paces; Specificity or adaptations targeting; Finding your target race pace
Blood tests and biomarkers for triathletes with Dr. Kush Joshi and Dr. Joel McCay | EP#249
Q&A #101 - Home-based training camps; Best time of season for training camps and other considerations; Foam rolling
Musculoskeletal adaptations, "train low" strategies, and muscle fiber types with prof. John Hawley | EP#248
Q&A #100 - Long run duration and distance targets; Effective run training on reduced volume; Treadmill running in hot and humid climates
Training Talk with coach Mark Pearce | EP#247
Q&A #99 - VO2max, VLaMax and their training, racing, and metabolic implications; The "Sweet Spot vs. Polarised Training" debate
Open water swim training with Olympic gold medal coach Marcel Wouda | EP#246
Q&A #98 - Daily calorie needs, Energy Availability, and stress fractures
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