The Buzz

We just launched a new show on the UltraSignup network, and this is your first listen. The Claims Department puts fitness, health, and wellness science under the microscope. Zoë Rom co-hosts with Dr. Nick Tiller, an exercise physiologist, researcher, and author of The Skeptic's Guide to Sports Science. Every episode, they pick apart something you've probably seen on your feed: a supplement, a gadget, a training trend, or a confident claim from a famous podcaster. They look at what the research actually says, and they show you how to work it out yourself next time. In this first episode, Zoë and Nick dig into peptides. That covers BPC-157 and TB-500, the so-called "Wolverine Stack," and why so many athletes are injecting compounds that were never approved for human use. They also get into the fine print behind a wearable company's health claims. Like what you hear? Follow The Claims Department on YouTube or wherever you get your podcasts. New episodes drop every other Thursday.  Spotify: https://open.spotify.com/show/0WBiQDtu4QXau4faFBr0qx Apple: https://podcasts.apple.com/us/podcast/the-claims-department/id6822333314 Youtube: https://www.youtube.com/playlist?list=PLT0ovVd1qK7A

Karina Andersen is a 23-year-old skyrunner, former University of Colorado track athlete, and holder of the fastest known women's time on the Matterhorn's Lion Ridge, which she ran unsupported from Cervinia in 5:14:53 this August. In this conversation, Buzz and Karina get into why a 10K on the track might be harder than the Matterhorn, what happened when she walked off her NCAA team and into the Skyrunner World Series two months later, and why she spent three summers learning one mountain before she ran it. They also cover getting chased by a herd of goats on record day, what an underdeveloped prefrontal cortex has to do with alpinism, the double standard on risk for women in the mountains, and her long-game plan to get into France's elite ENSA guide school. Karina also talks with care about her friend Kalie McCrystal, the Canadian skyrunner who was lost on the Matterhorn on September 1 while scouting her own record attempt. This episode is brought to you by Wahoo KICKR RUN, the treadmill that matches your pace automatically and simulates real terrain from a 3% decline to a 15% incline. Learn more at wahoofitness.com. The Buzz is part of the UltraSignup Podcast Network.

Stephanie Case is a human rights lawyer, founder of Free to Run, Hardrock 100 board member, and the runner who won Ultra-Trail Snowdonia in 2025 while stopping to breastfeed at aid stations. Chris Twiggs is a longtime Hardrocker and fellow board member. Together they wrote the race's new inclusion policy for transgender and non-binary athletes. In this conversation, Buzz asks the questions everyone else is asking online: why the policy lets athletes register in the category that matches their gender identity, why Hardrock declined to follow World Athletics and the IOC toward gene testing, what the evidence actually says about performance advantage over 100 miles at altitude, and how the race is handling awards. Stephanie walks through the history of sex testing in sport, from the chromosome checks of the 1960s to the SRY screening now being rolled out, and explains why she thinks a lottery-based mountain race has no obligation to import elite track rules. The Buzz is supported by Arc'teryx.  The Buzz is part of the UltraSignup podcast network. 

Sophie Woods is a five-time UTMB finisher, three-time Tor des Geants finisher, Marathon des Sables veteran, and coach who lives in Andorra. This summer she set the overall fastest known time on the Via Alpina, running the full length of the Alps through eight countries in 28 days and 18 hours. In this conversation, Sophie explains why she wanted a project that scared her after a difficult few years of failed IVF, what six to seven thousand calories a day actually looks like (spoiler alert: lots of burritos). She and Buzz get into what changed when Stephanie Case's post turned a quiet FKT into a story thousands of people were following, how her husband George ran the crew so she never had to make a decision, what happens when your van breaks down on a Sunday in Switzerland with no cell service, and why three to four hours of sleep a night works.... right up until it doesn't. Plus, what Sophie is lining up for next. This episode is brought to you in part by Arc'teryx, whose new Sylan 2 is built for trail runners who want to move fast. Find it at an Arc'teryx store or Arcteryx.com. The Buzz is part of the UltraSignup Podcast Network.  

Mario Fraioli has spent nearly thirty years in running and still describes himself as infinitely curious, which is how a guy who came up through cross country and track ended up coaching Western States champions, marathoners, and mid-packers alike. In this episode, Buzz talks with the host of the Morning Shakeout about what's actually changed in coaching over the last decade: why the conversation shifted from calories per hour to grams of carbohydrate, why super shoes and better fueling have quietly rewritten how fast athletes recover, and why he thinks a "triathlonification" of ultrarunning is underway, with the Ironman playbook showing up everywhere from UTMB's qualification system to the expo-week vibe at big trail races. They also hash out whether or not running 100 miles is actually healthy. From there the conversation goes to the Dipsea, the oldest annual trail race in the world and the one race Mario has zero interest in running, and then through the seven training fundamentals he laid out in Outside: good runners are athletes first, rest is training and not punishment, small deposits compound, consistency beats intensity, perceived exertion is the most reliable metric you've got, once you get fancy fancy gets broken, and find joy in the drudgery. Find Mario's weekly newsletter and occasional podcast at themorningshakeout.com. This episode is brought to you by the Wahoo KICKR RUN. Learn more at wahoofitness.com.