{"version":1,"type":"rich","provider_name":"Libsyn","provider_url":"https:\/\/www.libsyn.com","height":90,"width":600,"title":"IMO 37 - Losing Weight to Run Faster Updates, Dynafish Going Crazy In China and Attempting The Marathon World Record in Jeans","description":"Welcome back to another unstructured In My Opinion episode. Matt shares an update on losing weight to run faster, the explosion of Chinese super shoes and Dynafish, a potential marathon world record attempt in jeans, HYROX plans, coaching updates and why he has backed away from frequent sauna use. Be coached by Matt: https:\/\/www.sweatelitecoaching.com\/coaching-2026 Join the Shareholders Club \/ Private Podcast Feed: https:\/\/www.sweatelite.co\/shareholders Matt Instagram: https:\/\/www.instagram.com\/mattinglisfox\/ Matt Training Log - Strava: https:\/\/www.strava.com\/athletes\/6248359\/ Contact Matt: matt@sweatelite.co Matt opens with updates on the Sweat Elite Podcast, including changes to the private feed, a new weekly subscriber hangout and a small number of coaching opportunities becoming available. The main discussion centres around losing weight to run faster, prompted partly by Josh Kerr's visible change in body composition alongside his recent performances. Matt reflects on his own marathon career, including a period where gaining roughly 3.5 kg coincided with slower marathon performances before intentionally losing around 4 kg and returning to consistent sub-2:20 racing. Matt explains the simple approach he has personally used - maintaining a modest calorie deficit on most days while prioritising high-volume, satiating foods, then aggressively increasing carbohydrate intake around important training. Rather than trying to remain perfectly fuelled every hour of every day, he discusses using roughly 12-hour windows before major sessions and races to maximise carbohydrate availability, followed by substantial refuelling afterwards. He also discusses why he avoids obsessing over daily scale weight, instead looking at longer-term trends and carbohydrate cycles. Matt believes intentional weight-loss phases should generally be relatively short - around 6 to 12 weeks for most athletes and rarely beyond 20 weeks - rather than becoming a permanent part of training. The conversation also tackles the stigma surrounding weight loss in endurance sport, RED-S, disordered eating and the potential danger of becoming obsessed with numbers. Matt stresses that this approach is only relevant to runners who genuinely have weight they can healthily lose and that improving performance should never come at the expense of long-term health. Later in the episode, Matt shares updates from the Chinese running shoe world, including upcoming laboratory testing of several Chinese super shoes and the rapid growth surrounding Dynafish. He discusses distribution delays, demand in China and plans for bringing more shoes into international markets. Matt also considers racing the Sydney Marathon in jeans and potentially attempting the marathon world record for running in jeans, before discussing his future racing ambitions, interest in trying HYROX and whether an Ironman is something he would ever consider. Finally, Matt explains why he has stopped frequent sauna sessions after noticing increasing fatigue and deteriorating training quality, despite initially introducing sauna as part of his marathon preparation. Topics: 00:00 Welcome and Setup 00:27 Topics and Context 02:46 Pro Podcast Changes 03:46 Subscriber Hangouts 06:05 Coaching Spots Open 07:12 Why Weight Matters 08:18 Josh Kerr Example 09:45 My Marathon Weight Shift 14:41 Stigma and Pushback 20:08 Simple Weight Loss Framework 24:34 Carb Timing for Workouts 28:59 Risks and Obsession Trap 30:38 Carb Cycles Not Scales 31:44 Avoid Number Obsession 32:47 Who Should Cut Weight 35:46 Coaching And Stigma 37:36 Chinese Shoe Lab Tests 39:39 Dynafish Distribution Plans 43:36 Sydney Jeans Marathon 45:40 Weight Loss And Future Goals 50:55 HYROX Versus Ironman 52:31 Sauna Fatigue Lesson 57:25 Wrap Up And Next Steps ","author_name":"Sweat Elite Podcast","author_url":"https:\/\/www.sweatelite.co\/","html":"