Let our athletes speak for us.

  • “Without Jenna’s coaching I would not have been able to accomplish my goal of running my first ultramarathon. Before working with Jenna, I was training on my own and stumbling along. When I finally decided to work with a coach, a friend recommended Jenna and right from the start I could tell that her wealth of knowledge was what I was looking for. Jenna not only provided a running schedule, but a strength training plan, stretching plan, guidance on nutrition and fueling during a race, and overall race strategy. An ultra is about so much more than simply logging miles and without Jenna’s guidance across all areas, I would not have been able to accomplish this major life accomplishment of running 50 miles! I would recommend her to anyone looking to up their game and take on a major life challenge.”

    -Tony B.

    Ice Age 50 Mile Race

  • "Working with Coach Becca and Coach Jenna was one of the best decisions I've ever made and probably my number 1 investment in my physical health. I was new to running and doing the best I could on my own but came off my first half marathon with severe ITB syndrome. They set me on a good path with a clear plan and helped me complete my first marathon! I will continue to be coached by NLF on all my future running goals."

    -Jesse S.

    Mesa Marathon

  • "Coach Jenna and her team of coaches at Next Level Fitness come highly recommended. Through their extensive experience as endurance athletes themselves, and their complete dedication to the athletes are only a small example of how impressive their coaching techniques truly are. The experience was unlike any other coaching experience I have ever had! Everything from timely responsiveness to questions and knowing how hard to push the boundaries of fitness, to the ample suggestions of information on nutritional recommendations, Jenna and her team lay out an exceptional plan that fits to the demands of busy individuals needing flexibility and guidance."

    -Daniel K.

    Kona 70.3, Aukeman Beast, & Washington 70.3

  • "There is no doubt Jenna's expertise got me through my first ultramarathon where I placed 2nd female. Jenna's knowledge in strength training, nutrition, and her running plans are so incomparable to any coach that I've ever had. I work full time, have 3 boys busy with sports, have lots of travel and Jenna works the training around my busy life. I just turned 40 years old and I am really in the best shape that I have ever been in! Jenna's always available for any questions or concerns that come up and she genuinely cares about her athletes. She is just an amazing coach and I would recommend her and her team to anyone looking for a fitness coach or chasing a goal. I can't wait for what 2026 has for myself because I've got some big goals set and I know with Jenna's expertise that I will achieve them. Jenna and her team are just amazing to work with!"

    -Trisha Kutz

    Maah Daah Hey 57M, Boston Marathon, Berlin Marathon

  • "When an athlete searches for a running coach, they primarily want someone who will take them out of their comfort zone to reach that next level, provide accountability, have consistent and great communication, give motivation when needed, and have an extensive running knowledge base. Choosing a coach can be overwhelming. So when you realize that Jenna provides everything you need to be successful, it's a no-brainer to work with her! Jenna made me feel like her top priority by giving frequent, immediate feedback, quick responses, and detailed phone calls. There is absolutely no way I would have qualified for Boston without Jenna!!!"

    -Tracy D.

    Wilmington Marathon

  • "While I’ve never been the fastest runner, I’ve been doing ultramarathons for over 7 years. I grabbed Jenna as a coach with the dream of running 100 miles within the year. I had my eyes set on Leadville, but knew I couldn’t plan for that, as it’s a lottery system. I entered the Austin Rattler 50k as a hope to maybe get a random coin through the lottery at the end of the race. Instead, I EARNED a coin by placing top 3. Never in my life could I have imagined that I would be FAST enough to place at a Leadville qualifying race. (Quick little insert here: when I finished this race, Jenna texted me faster than my MOM to tell me congratulations). Fast forward to Leadville time and I was a DNF around 75 miles in. While my legs and my heart were overly prepared for this race, my stomach had other plans. I went to bed that night and woke up the next day with zero soreness. How could my body be so prepared to run 100 miles that 75 didn’t even phase it? I’m not the expert here, you’ll have to ask jenna 😂 The lack of soreness actually infuriated me and I decided to finish the course that day. I had my husband drop me off exactly where I DNFed in the race and I ran it alone. Without Jennas’s guidance and confidence in me, I’m not sure I would have had the physical or mental strength to go out there and finish what I started. I cannot recommend Jenna enough—she’s a great coach but she’s also just a really great human."

    -Melanie B.

    Austin Rattler 50K, Leadville 100M

  • "I had done several ultras in the past, finishing 6 and DNF-ing 3. But I always felt pretty horrible during and after them. I was training on my own but mostly “winging” it and going in under prepared. Then I got into my dream race, Moab 240. If I wanted to be successful and complete the Moab 240, I needed accountability and a plan. Fortunately, the algorithm also knew what I needed and an ad for Next Level Fitness entered my IG feed. Jenna made my plan customized around my unorthodox work schedule, and it included a race hydration and nutrition strategy, which I never considered before. I followed Jenna's plan and coaching to a "T". Going into the Moab 240, I felt strong and was confident I could complete the race and in just under 105 hours, I did! From this point on, all my ultra-training will be managed by NLF! Without them, I would not have made it 240 miles."

    -Danielle G.

    Moab 240M

  • "I would highly recommend Jenna and the Next Level Fitness team! What stood out to me, having worked with other online fitness coaches before, was Jenna's commitment to me as an individual. Not only was the training plan very easy to follow, but I especially liked our check-in calls where she was extremely helpful when it came to things outside of running like nutrition and hydration, race strategy, and marathon tips and tricks. Strength training was a big focus and I think helped a lot. As well as stretching and mobility, which aided with injury prevention and recovery. All the coaches were very easy to get a hold of, communication was always very strong. And ultimately I was very pleased to get an 8 minute PR on my marathon! So, again, I highly recommend the NLF team and I'm excited to be working with them again this year!"

    -Laura M.

    Baystate Marathon

  • “Thank you, Jenna, for all the hard and detailed training this summer. This was my first time ever using a coach for a race and I will absolutely do it again. Life and work get real busy and sometimes in the past my workouts would be an afterthought at the end of a long day. Having a specific detailed plan mapped out for me gave me a different focus I feel like I haven't had for the past few races. I went into Twisted Branch 100K feeling unstoppable. Let's do it again soon 💪"

    -Ryan C.

    Twisted Branch 100K Race

  • "Jenna has helped me gain a wonderful appreciation of what it takes to get to this accomplishment of becoming an IRONMAN. She has coached me through injuries, hardships that come with my size being 6'2" and 200lbs, and all those little barriers that each of us have to overcome. But she took all my strengths and weaknesses and helped me become the best version of myself. I'm a physician, surgeon, father to 3 little girls, and through my commitment to being coached by Jenna, she helped me juggle all of that and accomplish my dream. I not only completed the IM but finished it in 9hr 45min, putting me in a competitive position for top in my age group and qualifying for Kona. If you want to feel what I feel right now, which is the passion for someone who's accomplished so much in her life to give you a snippet of what it takes to be truly world class, I would give whatever it takes to get on Jenna's team. If I can do this, you can achieve your goals and you should commit to this. Find it in yourself to understand that you need a team to get there, and Jenna and her team at NLF are just the perfect group to help you get there!"

    -Daniel M.

    Ironman Florida

  • "I've been a runner for a about 9 years and a year and a half ago I met Jenna, right after I had signed up to run a 24 hour backyard race. My wife and mom both insisted I needed a coach so I found Jenna, and sure enough she was exactly what I needed! Up to that point my longest run ever was 14 miles. After just 12 weeks of training, I not only ran over 100 miles at the 24 hour race but got first place! I crushed it and I could not have done it without Jenna. I then signed up for my first regular marathon and with just 8 weeks of training with Jenna and only 3 months after my 100M, I smashed my goal of a sub 3:30hr time. I would definitely recommend NLF if you're looking to have a coach that will keep you accountable and help you achieve your goals!"

    -Chris A.

    Azeala 24hr Race, Donna Marathon

  • “Jenna is top notch. The plan she provided me was personalized and worked with my hectic lifestyle. She listened to my needs and worked around my crazy hours as best as possible while still giving me a product that pushed me and made me better. If you're ready to commit to something that will improve your fitness, Jenna can give you that opportunity. I was able to shed 45 minutes off my 50k with 3 months of training. The numbers don't lie. Don't hesitate on talking to Jenna about your running goals because she can help.”

    -Brandon B.

    Skyline 50K Race

  • "I had the opportunity to work with Next Level Fitness with Jenna as my coach. I only had 3 months to train for my first 100 miler, but within those 3 months, she helped me reach unbelievable goals. It was definitely not possible without her help and guidance. Within those 3 months, I feel like my life changed dramatically and I learned so much that I didn't even know existed in ultramarathons! With Jenna's help, it felt like I understood the game more than I ever was going to and within such a short amount of time. That's exactly why I am signing up to work with NLF again. I want to inspire other people like Jenna is doing. Her belief in me allowed me to have fun and be successful!"

    -Manny C.

    Crown Stub 100M

  • “As a fitness enthusiast and ex-crossfit athlete, I was VERY apprehensive about approaching distance running and ultramarathons. To be honest, I had no idea what I was doing but I knew I needed a new fitness goal and someone to guide me along the way. Jenna did EXACTLY that. She taught me about the rigors of training, the joy that comes with distance running, and showed me how wonderful the running community can be. My first attempt at the Leadville 100 Mile Trail Race, I tried to complete it all on my own with no coach. I was underprepared, under-fueled, and ended up having a horrendous race, pulling out at the 60 mile mark. The second attempt at Leadville 100, I had Jenna as my coach. With Jenna, I not only finished the race, but I ENJOYED it, something I never would have guessed after the horror of my first 100 miler attempt. Jenna is the real deal, through and through. You will not find a coach that is more in your corner!!!”

    -Michael M.

    Leadville 100M

  • “I reached out to Jenna for coaching after running my first marathon. I wanted to start running ultras but didn’t really know where to begin. She specifically designed a program for me and the race I was going to attempt. She also helped me with gear, running shoes and race day strategies. The biggest thing that separates Jenna from other coaches is that she is an experienced ultramarathon runner who has put in the work. She has significant success through years of training/racing. She will get you where you need to be. Reach out to her today!”

    -Carl T.

    Ironbull 85K Race

  • “You don’t have to be an ultramarathoner to work with Jenna! I’m a less than one mile run kinda woman right now and my goals are more oriented towards strength and improving my frequency and confidence in gym visits. Jenna will meet you where you’re at and will always leave opportunity for you to seriously consider going harder but she doesn’t pressure you to do so unless you’ve agreed to that tactic. She’ll make sure you’re feeling good about the workout selections, that the movements feel natural to you, and that you’re doing them correctly/safely. You won’t find someone more committed and qualified to be your coach.”

    -Laurie D.

    Strength Training and General Fitness Client

  • "Wild Duluth 50K was no joke, but the views are so worth it. I would be remiss if I didn't thank Coach Jenna from Next Level Fitness for bringing the joy and passion back into my running. With that joy, I overcame some major blocks mentally. Without Jenna's week to week tutelage, I don't get the axe [finisher's token at Wild Duluth] or to 72 miles at Superior 100.

    -Derek S.

    Wild Duluth 50k & Superior 100

Podcasts Featuring Coach Jenna as a Guest

Human Potential Running Series Podcast, Episode #56

January 28th, 2025

Take a run with The Human Potential Running Series podcast. For Episode 56, we welcome HPRS community member Jenna Carosio to talk about her life experiences and journey into running. In this episode we talk about Jenna’s journey going from a collegiate soccer player, to roaming the world for 2 years, to her becoming a triathlete and ultra endurance athlete. We also discuss her journey from being a civil engineer to becoming an endurance coach for athletes of all abilities. A great episode with an inspiring woman, who has overcome a lot on her path to helping others overcome life’s many challenges.