That Triathlon Show

Bruce Rogers, MD, is one of the researchers behind the research on using the non-linear HRV-based marker DFA alpha-1 (which can be be measured non-invasively and for free or very cheaply) to assess the aerobic threshold. We discuss this research and its applications in this interview.    IN THIS EPISODE YOU'LL LEARN ABOUT: -What is DFA alpha-1, and how can you measure it?  -The current evidence behind using DFA alpha-1 as a marker for the aerobic threshold (LT1/VT1) -Testing protocols, and hardware and software requirements for testing -Limitations and challenges, including devices, artifacts, and training modality -How to incorporate DFA alpha-1 testing in your training -Other potential applications of DFA alpha-1, including assessing fatigue and durability SHOWNOTES: https://scientifictriathlon.com/tts329/ SCIENTIFIC TRIATHLON AND THAT TRIATHLON SHOW WEBPAGE: www.scientifictriathlon.com/podcast/ SPONSORS: Precision Fuel & Hydration - Optimise and individualise your fueling and hydration strategy using the free online Sweat Test and Quick Carb Calculator on precisionfuelandhydration.com. Book a free one-on-one consultation to chat with the team and refine your fueling and hydration even further. Listeners of That Triathlon Show get 15% off their first order of fueling and hydration products. If you didn't catch the discount code in the episode, email Andy and the team at hello@precicionhydration.com and they will be happy to help.  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. LINKS AND RESOURCES: Bruce profiles on Twitter and Research Gate A New Detection Method Defining the Aerobic Threshold for Endurance Exercise and Training Prescription Based on Fractal Correlation Properties of Heart Rate Variability - Rogers et al. 2021 An Index of Non-Linear HRV as a Proxy of the Aerobic Threshold Based on Blood Lactate Concentration in Elite Triathletes - Rogers et al. 2022 Detection of the Anaerobic Threshold in Endurance Sports: Validation of a New Method Using Correlation Properties of Heart Rate Variability - Rogers et al. 2021 Influence of Artefact Correction and Recording Device Type on the Practical Application of a Non-Linear Heart Rate Variability Biomarker for Aerobic Threshold Determination - Rogers et al. 2021 Fractal correlation properties of heart rate variability as a biomarker of endurance exercise fatigue in ultramarathon runners - Rogers et al. 2021 Correlation Properties of Heart Rate Variability during a Marathon Race in Recreational Runners: Potential Biomarker of Complex Regulation during Endurance Exercise - Rogers et al. 2021 Heart Rate Variability – New perspectives and insights with Marco Altini, PhD | EP#325 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.

Luca Filipas, PhD, is a researcher at the University of Milan and an endurance sports coach of professional and amateur runners, cyclists, and triathletes. In this interview, we discuss his recent study comparing polarised, pyramidal, and combined POL-PYR or PYR-POL training intensity distributions, and the applications of this research in planning a periodised endurance training plan.  IN THIS EPISODE YOU'LL LEARN ABOUT: -How combining pyramidal and polarised training blocks (in that specific order) may be a more effective periodisation scheme to optimise endurance performance -How the goal event (e.g. 5k vs. marathon running) might influence and change these findings -The alignment of a pyramidal-polarised periodisation with classic tapering and peaking research -Periodisation across a season: the importance of downtime and careful race planning -Luca's coaching methodology and top tips for endurance athletes SHOWNOTES: https://scientifictriathlon.com/tts328/ 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 one of a kind swim bench for time-crunched triathletes looking to improve their swim technique, power and propulsion, and consistency of swim training. It is very affordable, about the price of a pair of running shoes, and Zen8 offer free shipping in the US and the UK. Best of all, you can try it risk-free. If you don't love it after two weeks, send it back and get a full refund. Get 20% off your order at zen8swimtrainer.com/tts. LINKS AND RESOURCES: Luca's website, Instagram, Twitter and Research Gate Effects of 16 weeks of pyramidal and polarized training intensity distributions in well-trained endurance runners - Filipas et al. 2021 The training intensity distribution among well-trained and elite endurance athletes - Stöggl and Sperlich 2015 The integration of training and off-training activities substantially alters training volume and load analysis in elite rowers - Treff et al. 2021 Tapering, periodisation and recovery with Iñigo Mujika, PhD | EP#256 Scientific Training for Endurance Athletes with Dr. Philip Skiba | EP#311 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.

Olli-Pekka Nuuttila is a doctoral researcher at the University of Jyväskylä. In this interview we discuss his recent study comparing two-week blocks of either increased volume (70% increase over baseline) or increased intensity (5 interval sessions per week), and how the findings can be applied in the real world.   IN THIS EPISODE YOU'LL LEARN ABOUT: -How does a two-week block of volume or intensity impact performance (3000m running time trial), subjective markers of recovery, and hormonal/biomarkers of recovery and stress? -The impact of adding a recovery week after a two-week focused block on volume or intensity -Individual variations in response and non-responders or trivial responses -When and how to incorporate volume blocks or intensity blocks in your training SHOWNOTES: https://scientifictriathlon.com/tts327/ SCIENTIFIC TRIATHLON AND THAT TRIATHLON SHOW WEBPAGE: www.scientifictriathlon.com/podcast/ SPONSORS: Precision Fuel & Hydration - Optimise and individualise your fueling and hydration strategy using the free online Sweat Test and Quick Carb Calculator on precisionfuelandhydration.com. Book a free one-on-one consultation to chat with the team and refine your fueling and hydration even further. Listeners of That Triathlon Show get 15% off their first order of fueling and hydration products. If you didn't catch the discount code in the episode, email Andy and the team at hello@precicionhydration.com and they will be happy to help.  ZEN8 - The ZEN8 Indoor Swim Trainer is a one of a kind swim bench for time-crunched triathletes looking to improve their swim technique, power and propulsion, and consistency of swim training. It is very affordable, about the price of a pair of running shoes, and Zen8 offer free shipping in the US and the UK. Best of all, you can try it risk-free. If you don't love it after two weeks, send it back and get a full refund. Get 20% off your order at zen8swimtrainer.com/tts. LINKS AND RESOURCES: Olli-Pekka's Twitter and ResearchGate Physiological, Perceptual, and Performance Responses to the 2-wk Block of High- versus Low-Intensity Endurance Training - Nuuttila et al. 2022 Acute Physiological Responses to Four Running Sessions Performed at Different Intensity Zones - Nuuttila et al. 2020 A Scientific Approach to Improve Physiological Capacity of an Elite Cyclist - Ronnestad et al. 2017 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.

Scott Johnston is an endurance sports coach, author, and co-founder of the coaching business Uphill Athlete. The main focus of Scott and his company is coaching mountain sport athletes, like mountain runners, climbers, and ski mountaineers, but Scott also has an extensive background in more traditional endurance sports like swimming, cross-country skiing, and even triathlon.   IN THIS EPISODE YOU'LL LEARN ABOUT: -What do we mean by "aerobic base", and how do you develop a really strong aerobic base?  -How should aerobic training be executed?  -How and when should you balance high-intensity training into your training program?  -Training zones: Scott's recommendations for how to assess and use training zones -Testing: the Heart Rate Drift test for assessing your aerobic threshold SHOWNOTES: https://scientifictriathlon.com/tts326/ SCIENTIFIC TRIATHLON AND THAT TRIATHLON SHOW WEBPAGE: www.scientifictriathlon.com/podcast/ SPONSORS: Precision Fuel & Hydration - Optimise and individualise your fueling and hydration strategy using the free online Sweat Test and Quick Carb Calculator on precisionfuelandhydration.com. Book a free one-on-one consultation to chat with the team and refine your fueling and hydration even further. Listeners of That Triathlon Show get 15% off their first order of fueling and hydration products. If you didn't catch the discount code in the episode, email Andy and the team at hello@precicionhydration.com and they will be happy to help.  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. LINKS AND RESOURCES: Uphill Athlete (Scott's coaching business) website, Youtube, and Instagram Training for the New Alpinism and Training for the Uphill Athlete - Scott's books Related articles on Uphill Athlete: Heart Rate Drift test instructions, How to set your training zones, and Training zones heart rate calculator Polarised training with Stephen Seiler, PhD | EP#177 Training structure, periodisation and the science of winning with Jan Olbrecht, PhD | EP#198 The Science of Winning: Planning, Periodizing and Optimizing Swim Training (Kindle Edition) by Jan Olbrecht Special Strength Training: Manual For Coaches & Block Training System in Endurance Running by prof. Yuri Verkoshansky 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.

Marco Altini, has a PhD in Data Science and an MSc in Human Movement Sciences and High-Performance Coaching. He is the founder of HRV4Training and a passionate runner. In this interview, we discuss the latest in research and application when it comes to heart rate variability (HRV). IN THIS EPISODE YOU'LL LEARN ABOUT: -A brief summary of what HRV is and the benefits of monitoring it -What are the most important factors that influence HRV and resting heart rate (RHR), and what are their relative importance or magnitude? Based on Marco's large-scale, free-living study published in late 2021.  -Chest strap or phone camera measurement of HRV: what are the differences?  -Should you measure in the morning, or use a tool that allows you to measure HRV all night (and day)?  -How to use and interpret HRV and RHR - why and when to rely on one or the other -The current state of evidence when it comes to "HRV-guided training"  SHOWNOTES: https://scientifictriathlon.com/tts325/ 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 one of a kind swim bench for time-crunched triathletes looking to improve their swim technique, power and propulsion, and consistency of swim training. It is very affordable, about the price of a pair of running shoes, and Zen8 offer free shipping in the US and the UK. Best of all, you can try it risk-free. If you don't love it after two weeks, send it back and get a full refund. Get 20% off your order at zen8swimtrainer.com/tts. LINKS AND RESOURCES: Marco's website, Medium blog, Instagram, Twitter and Research Gate HRV4Training website and Instagram Heart Rate Variability (HRV) – Applications and Insights in 2018 and Beyond with Marco Altini | EP#144 What Is behind Changes in Resting Heart Rate and Heart Rate Variability? A Large-Scale Analysis of Longitudinal Measurements Acquired in Free-Living - Altini and Plews 2021 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.

Andy Kirkland, PhD, is a triathlon coach, sports physiologist, and lecturer in sports coaching at the University of Stirling. In this interview, Andy shares his perspectives on a number of topics related to coaching from his experience as a coach, coach educator, and as a part of various high-performance environments.    IN THIS EPISODE YOU'LL LEARN ABOUT: -Getting a degree in Sports Coaching, and the master's program at the University of Stirling -Pathways into coaching, including graduate programs in coaching as compared to exercise science and physiology degrees -Beyond training and physiology: what are the domains of expertise a good coach needs to have a good grasp on?  -How to build good coach-athlete relationships -The role for physiology in coaching, and common pitfalls in applying physiology -How to continually improve your coaching practices and skills   SHOWNOTES: https://scientifictriathlon.com/tts324/   SCIENTIFIC TRIATHLON AND THAT TRIATHLON SHOW WEBPAGE: www.scientifictriathlon.com/podcast/   SPONSORS: Precision Fuel & Hydration - Optimise and individualise your fueling and hydration strategy using the free online Sweat Test and Quick Carb Calculator on precisionfuelandhydration.com. Book a free one-on-one consultation to chat with the team and refine your fueling and hydration even further. Listeners of That Triathlon Show get 15% off their first order of fueling and hydration products. If you didn't catch the discount code in the episode, email Andy and the team at hello@precicionhydration.com and they will be happy to help.    ZEN8 - The ZEN8 Indoor Swim Trainer is a one of a kind swim bench for time-crunched triathletes looking to improve their swim technique, power and propulsion, and consistency of swim training. It is very affordable, about the price of a pair of running shoes, and Zen8 offer free shipping in the US and the UK. Best of all, you can try it risk-free. If you don't love it after two weeks, send it back and get a full refund. Get 20% off your order at zen8swimtrainer.com/tts.   LINKS AND RESOURCES: Andy's website, Twitter, and University of Stirling profile Training methods of Ethiopian runners with Michael Crawley | EP#275 Out of Thin Air: Running Wisdom and Magic from Above the Clouds in Ethiopia - Michael Crawley's book Critical Power and VO2 kinetics with Mark Burnley, PhD | EP#257 A Life Without Limits: A World Champion's Journey - Chrissie Wellington's book 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.

Adam Kerin is the founder of Zero Friction Cycling. At ZFC he does independent testing of chain lubricants, and he also provides services (to individuals and businesses) and retails products related to reducing friction in the drive train, which ultimately helps you save watts and save money.     IN THIS EPISODE YOU'LL LEARN ABOUT: -Performance consequences of low- and high-friction drivetrains. -Wear and tear, and financial consequences of low- and high-friction drivetrains. -Different methods and tools for chain lubrication, and pros and cons of each.  -How to get started with waxing your chain, and why you should consider it.  -Race chains, training chains, and smart chain rotation.    SHOWNOTES: https://scientifictriathlon.com/tts323/   SCIENTIFIC TRIATHLON AND THAT TRIATHLON SHOW WEBPAGE: www.scientifictriathlon.com/podcast/   SPONSORS: Precision Fuel & Hydration - Optimise and individualise your fueling and hydration strategy using the free online Sweat Test and Quick Carb Calculator on precisionfuelandhydration.com. Book a free one-on-one consultation to chat with the team and refine your fueling and hydration even further. Listeners of That Triathlon Show get 15% off their first order of fueling and hydration products. If you didn't catch the discount code in the episode, email Andy and the team at hello@precicionhydration.com and they will be happy to help.    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.   LINKS AND RESOURCES: Zero Friction Cycling (Adam's business) website, Youtube, and Instagram The Physical Performance Show: Assoc. Professor Max Paquette: ‘Running Surface Interactions’ All Cycling-related episodes on That Triathlon Show   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.

Associate Professor Dustin Joubert of Stephen F. Austin State University discusses his study comparing seven carbon-plated "Super Shoes", and how runners and triathletes should interpret and use the results. We also discuss more informal testing that Dr Joubert is doing on a regular basis in his lab, including shoes not included in the study.    IN THIS EPISODE YOU'LL LEARN ABOUT: -What is a super shoe, what are the purported benefits, and the proposed mechanisms behind them?  -The Super Shoe study: protocol, shoes included, results and conclusions. Are the Nikes all-conquering?  -What does this mean for consumers? How should triathletes and runners go about selecting shoes for racing?  -Dr Joubert's informal testing, including the Adidas Adios Pro 2 and running in crocs!  -How do running economy benefits translate to performance benefits?  -What happens to the benefits from Super Shoes when running uphill or downhill?    SHOWNOTES: https://scientifictriathlon.com/tts322/   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 one of a kind swim bench for time-crunched triathletes looking to improve their swim technique, power and propulsion, and consistency of swim training. It is very affordable, about the price of a pair of running shoes, and Zen8 offer free shipping in the US and the UK. Best of all, you can try it risk-free. If you don't love it after two weeks, send it back and get a full refund. Get 20% off your order at zen8swimtrainer.com/tts.   LINKS AND RESOURCES: Dustin's Instagram and Research Gate A Comparison of Running Economy Across Seven Carbon-Plated Racing Shoes - Joubert & Jones 2021 A Case Study Comparison of Two Carbon-Plated Running Shoes on Running Economy and Running Mechanics - Joubert et al. 2021 Metabolic cost of level, uphill, and downhill running in highly cushioned shoes with carbon-fiber plates - Whithing et al. 2021 Nike Vaporfly 4% – can these shoes really make you run faster? with Wouter Hoogkamer | EP#179 Extrapolating Metabolic Savings in Running: Implications for Performance Predictions - Kipp et al. 2019 Excel spreadsheet: calculate race time savings based on economy improvements   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.

Associate Professor Max Paquette of the University of Memphis joins us to discuss training load in running, as well as running biomechanics and injury risk.    IN THIS EPISODE YOU'LL LEARN ABOUT: -Training load in running: how should we approach it, and the issues with commonly used methods -Neuromuscular load or mechanical load: what is it and which factors impact it -The impact of ground surface on mechanical load and injury risk -Uphill running vs. running on the flats and injury risk -Intensity control and the impact of intensity on mechanical load and injury risk -Injury risk and recovery times for the aging runner -Footwear, shoe rotation and shoe replacement   SHOWNOTES: https://scientifictriathlon.com/tts321/   SCIENTIFIC TRIATHLON AND THAT TRIATHLON SHOW WEBPAGE: www.scientifictriathlon.com/podcast/   SPONSORS: Precision Fuel & Hydration - Optimise and individualise your fueling and hydration strategy using the free online Sweat Test and Quick Carb Calculator on precisionfuelandhydration.com. Then book a free one-on-one consultation to chat with the team and refine your even further. Listeners of That Triathlon Show get 15% off their first order of fueling and hydration products. If you didn't catch the discount code in the episode, email Andy and the team at hello@precicionhydration.com and they will be happy to help.     ZEN8 - The ZEN8 Indoor Swim Trainer is a one of a kind swim bench for time-crunched triathletes looking to improve their swim technique, power and propulsion, and consistency of swim training. It is very affordable, about the price of a pair of running shoes, and Zen8 offer free shipping in the US and the UK. Best of all, you can try it risk-free. If you don't love it after two weeks, send it back and get a full refund. Get 20% off your order at zen8swimtrainer.com/tts.   LINKS AND RESOURCES: Max's profile on Twitter, ResearchGate, and the University of Memphis website Running biomechanics, economy, and training load with Izzy Moore, PhD | EP#241 Max interviewed on the Physical Performance Show about running surface interactions Moving Beyond Weekly ‘Distance’: Optimizing Quantification of Training Load in Runners - Paquette et. al 2020 Comparison of different measures to monitor week-to-week changes in training load in high school runners - Ryan et. al 2020  All previous Running-related episodes on That Triathlon Show   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.

Brenton Ford is a swim coach based in Australia. Brenton is the founder of Effortless Swimming, a swim coaching business through which he helps triathletes and swimmers improve their swim technique with free content (e.g. Youtube and podcast) as well as in-person clinics and online programs.    IN THIS EPISODE YOU'LL LEARN ABOUT: -Limiters for swim performance in age-group triathletes -What is good freestyle swimming technique in an age-group triathlon context?  -How to improve your freestyle swimming technique -Training structure, and how to train for fitness improvements -The value of video analysis and how to get the most out of it   SHOWNOTES: https://scientifictriathlon.com/tts320/   SCIENTIFIC TRIATHLON AND THAT TRIATHLON SHOW WEBPAGE: www.scientifictriathlon.com/podcast/   SPONSORS: Precision Fuel & Hydration - Optimise and individualise your fueling and hydration strategy using the free online Sweat Test and Quick Carb Calculator on precisionfuelandhydration.com. Then book a free one-on-one consultation to chat with the team and refine your even further. Listeners of That Triathlon Show get 15% off their first order of fueling and hydration products. If you didn't catch the discount code in the episode, email Andy and the team at hello@precicionhydration.com and they will be happy to help.    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.   LINKS AND RESOURCES: Effortless Swimming (Brenton's business) website, Youtube, podcast and Instagram Open water swimming: training and racing tips with coach Brenton Ford | EP#18 All previous Swimming-related episodes on That Triathlon Show   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.