Hey Jason, just heard you on TCA. Speedy recovery from your knee surgery. Also I’m really enjoying your CTS workouts. Thanks a million!!!

Thank you for constantly providing great episodes and doing so without sponsors

Too arrogant to listen too. Too much pontification.

Immature man child. The science is why I listened but the host is unprofessional and unhinged. I’ll find my running science elsewhere.

No-nonsense deep-dive into the real science behind running. I appreciate the host’s skepticism and wry sense of humor. The back catalogue regarding nutrition and training periodization is particularly helpful for all runners, not just trail amd uktra runners. It’s nice to listen to a non-sponsored podcast where the host isn’t afraid to challenge guests on nonsense!

CTS is named for a doping enabler and Koop is a know-it-all. Bad vibes only!

Cool show if you want to listen to a narcissistic bully.

Thanks again Jason for your passion and work!

Great content, specific advise, very practical and useful. Based of proven research, honest and trustworthy advice

Learnt a lot from this podcast.

I used to cherry pick some of these episodes and learned some things, however take a listen to episode 161 (2023 preview) before you get too far into this guy’s ecosystem. He aggressively targets other well known coaches and podcasts by name and is quite nasty towards them. One of the things I love about the trail running community is the way we lift each other up, but he unfortunately demonstrates the opposite. It’s fine to have style preferences, but there shouldn’t be any room for this in our sport.

Jason doesn’t hide behind anything and tells it like it is. He never makes talks down to us! I have learned so much from his pod!!

I just can’t get past the condescending narcissism any longer.

So much fascinating and useful information. I’m working on educating myself about the newest research on ultra running this year, after years of relying on a coach, and this podcast has been such a fantastic resource.

Interesting guests. It seems like the host wants to move between technical/scientific language and ‘layperson’ language. If so, I respect the intent, but in the process he makes offensive assumptions about the listener, the running community at large. He also makes more accurate assumptions, but the approach is damaging nonetheless. Human intentions are far more nuanced than the way he often paints them (in the four episodes I’ve listened to). Perhaps he will re-evaluate his deep seated stereotypes of the runners and listeners, and instead sacrifice the illusion of hard nosed confidence in order to become a more dynamic and flexible host. Or, perhaps he won’t. I may not stick around to find out.

I look forward to each new episode that comes out. Great podcast!

Always high quality guests and content. Research heavy, but able to bring it back to practical applications primarily for ultra marathon runners. No ads, no sponsored content. Unbiased apart from his loyalty to CTS Training.

Koop never ceases to impress with relevant topics, deep dives into current research, and critically, practical takeaways in every episode. Moreover his choice to remain ad and sponsor free is indicative of his unwavering commitment to providing information that is unbiased with regard to the usual hawking of products and supplements so common in other running/training podcasts. Finally, his unfiltered commentary and sharp humor make this the #1 podcast in my feed-as it has been since it’s first airing. I regret that I am only now just reviewing it! If you are serious about your training and racing-or simply just someone who geeks out on the science of it all, IMHO there is no other podcast that comes close.

I love Koop for his dives into research and featuring guests that can speak to the science yet provide some practical tips. The chats with the coaches about nutrition/hydration/performance-related aspects are sometimes annoying because it seems ya'll forget there are Sport Dietitians out here that work with ultra runners (and coaches shouldn't be doing all of that work to help athletes). Also, Koop, sometimes your frequent "yeah, yeah, yeahs" like in episode 163 are hard to keep hearing. But keep up the good work - this really is a great pod overall.

Used to enjoy this pod. It’s one thing to be critical and have hot takes but to call someone out in such a condescending way and not offer any feedback is just bad form. Frankly I got major narcissist vibes from all of episode 161 and it was gross. Not what this community needs.

I hit unsubscribe on this one today after listening to the host bash competitors in the podcast and online content space in an unfair manner and in a way that made clear he was actually also unfamiliar with the true content behind what he was criticizing. For someone who led the episode with a bit of a rant about professionalism, it was rather hypocritical. The podcast has some interesting episodes with a good in-depth exploration of topics but it isn’t worth listening to if it is going to devolve into what I heard today or what I have seen recently on social media from the host also bashing other coaches In passive aggressive or unfair and uncalled for ways. So what I would have made a 4-5 star review now is unfortunately a 2.

I was enjoying some episodes of this podcast until episode 161, when this guy put up a 15 minute episode just to talk negatively about other coaches and writers. Total waste of my time while he came off petty and jaded. If you’re a believer in making the world a better place or building up the ultra running community rather than tearing it down, look for another podcast.

Just listened to the Jan 2023 monologue, which was a shameless, unfounded, and self-serving attack on members of the trail community. This is insecurity masquerading as integrity. I’ve lost all respect for Jason Koop as a coach and as a podcaster. Not cool dude.

Listen to this if you want to take the fun out of your running.

Love the knowledge and insight.

So many running podcasts have done episodes on strength training and trust me I’ve listened to all of them. Koopcast’s latest two part series on strength training was THE BEST, most comprehensive and easy to follow summary I’ve heard on the topic. Major kudos!

Tons of quality and scientific based information to help you be a better runner, athlete, and coach. Can’t recommend this podcast enough.

Jason takes an evidence-based approach to discussing all aspects of running with his guests. I’m a lifelong runner but new to the ultra world. Jason’s podcast has been an amazing window into everything I didn’t know about running and then some! He’s got a great sense of humor too. Highly recommend!

As a lifelong athlete, I love the content this podcast delivers. Koop brings true experts to his show: doctors, nutritionists, scientists, etc. So you know you’re getting credible information. His dislike of “this works for me, so this may work for you” is what I enjoy the most. He truly understands that there is no cookie cutter solution to apply to athletes because everyone’s body is different. Great for a trail run listen or great to listen while I’m doing chores at home.

Love this podcast, the variety of speakers and issues to delve into. I highly recommend if you are into the WHY of how Ultra Running works. So many other podcasts put together by young athletes are fun, but nothing compares to REAL life experience and interesting examples! 🙌🏽

Kudos again to Jason Koop for staying away from regurgitating the same old tired “Runner of the Day” interviews and instead supplying informative & useful ultra running content. E118 and guest Meredith Terranova offer substantial nutrition advice that scientifically stand the test of time, and help you wade through the marketing hype of gels, fats, keto, etc. From day one, Koop has put forth content that guides, shapes & educates runners. If I want to be entertained by the running prowess of any contemporary athlete, there are plenty of other channels. But for solid advice, the KoopCast is the primary source. ⭐️⭐️⭐️⭐️⭐️

Hands down one of the best resources for evidence-based deep-dives into a myriad of topics related to ultramarathon training and performance. Whether you are a coach or athlete, each podcast will help you understand the ‘why’ behind the ‘what’ and you will glean actionable insights to help you optimize training. I’ve learned so much from this podcast, I look forward to its release every week, and I’m grateful for its existence.

My go to podcast for ultra running info. Jason Koop knows his stuff and if he doesn’t he has a guest who does. Keep up the excellent work

This guy is super smart and highly entertaining/high emotional IQ. A rare combo. No other science-y podcast keeps me quite so entertained! Two thumbs up.

Every time I listen to one of Jason’s podcasts I come away with helpful information. It also continues to spark my interest in ultra running, learning more, and being able to help others.

Coach Koop does a great job, he is very knowledgeable and has great guests and interesting topics. Loved this podcast from the first episode!

Very educational, informative and relevant to those who love to train for challenging ultras. Jason has completely refactored my training approach to be truly holistic and 24/7. He emphasizes key points that are paramount to success.

Jason is genuine - the real thing- with practical action steps to enhance my training experience as well as rock solid exercise science packed into each episode. He’s an engaging conversationalist and is able to banter with all kinds of people with ease, always showing great respect and no ego. Since he brings on so many experts and accomplished athletes, the podcast becomes an excellent foundation for learning in a wide variety of topics. A couple of favorites are his two Mental Skills episodes with Justin Ross and Karim Ramadan. He keeps things on track and on topic so that every part of the episode is strong content with enthusiasm!

Mr. Koop- In my own life, I often forgive myself so quickly for my shortcomings... I know a lot of others who do the same, and often that’s our best option... move on, grow. After a few night’s sleep our most cringe-worthy moments are forgotten. Yet, especially in this realm of recorded media, I haven’t found myself giving you and some others the same leeway to slip up now and then yet and find fresh eyes, optimism, understanding. I want to apologize for that. Your last episode — the first in a series on the threat of doping in the sport— opened up my view into who you are a little bit further, where you’re at, what has shaped you, and I could sense far more in common than not as far as fundamental values go. That was a solid episode and I’m looking forward to what’s to follow... keep up your strength and your trust.

Fantastic science, analysis and experienced based. Great podcast guests and topics. I look forward to every new episode and re-listen to many. I use a lot of the topics covered for my training with great results. Awesome to be able to listen into experts conversations. Highly recommend.

Koop’s show is hands down the best out there in podcastland for real, technical trail running training and racing information. Koop is well researched, thorough, brings on the right guests, and always provides the “cliff notes” version for each given topic after the conversation comes back out of the weeds!

This podcast is the best for breaking down current research and actual science not just opinions on the latest issues in sport and providing practical applications of how to use that information in training and decisions

Love this podcast. It’s a great mix of topics. The information is well cited and the interviewees are always experts in their field.

Love All The Time Put Into This Podcast And Koop Really Breaks It Down And I’ve Gotten So Much Info And Tips To Apply While Running Ultras And The Guest Are Fantastic Keep Up The Amazing Work Jason See You On The Trails

I love anything and everything running, and it’s even better when you have an incredible smart host who can interview well. I also love all things evidence based, and this podcast is full of the nitty gritty science without being pretentious and unapproachable.

Just an awesome show to listen to for everything Ultra. Jason knows his stuff and makes the science of trail running applicable for real world results. The guests are great too. Keep up the great work.

Advice and interviews from some of the top athletes, coaches and physiologists in the sport of Ultra Running. Educational, inspiring and entertaining!

Jason Koop’s show covers a plethora of topics that every Ultrarunner wonders about at some point or another. If you’re a person that asks a lot of “why” questions & you love to learn about this sport, he’s your guy. 🙌🏻

So many ultrarunning podcasts exists, but this is the only one that actually teaches you via science. It’s a refreshing listen for all experience levels. Only occasional criticism is that I have to concentrate to understand some international guests, but I love that Koop brings in the best of the best around the world.

I’ve really been enjoying the Koopcast! Jason does such a great job of interviewing really interesting athletes, coaches, and scientists in endurance sport. His episodes breaking down (sometimes) complicated research into digestible and actionable takeaways for the listeners is really fantastic.