Here at Rival, we’re not big into the “one size fits all” motto. We know that fitness is a little different for everybody. That’s why we keep our class lineup diverse and class sizes small, to allow for personalized instruction. Our Group Fitness Team features some of Seattle’s finest and most experienced fitness professionals. Every class instructor at Rival possesses their own unique blend of expertise, kindness, creativity, and humor – which is what makes Rival the highest-rated group fitness location in Capitol Hill.


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Samantha is a fitness enthusiast, a double nationally certified personal trainer, and group fitness instructor who specializes in indoor rowing, cycling and interval training. She strongly believes in the necessity for an active lifestyle, encompassing a balance of all the compulsory components of fitness.

Throughout her training career, it’s given Samantha great satisfaction to pass along her existing knowledge and enthusiasm with the highest standard of service, safety, and professionalism to those wanting to adopt a lifestyle of total body and mind wellness.

Her motto is, “One body, one life, live like you’re in your prime!”

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Kenzie is a lifelong athlete with eight years of coaching and almost two years of Seattle fitness instruction under her belt. She’s a certified ACE Group Fitness Instructor, as well as a Schwinn Indoor Cycling MPower, Kids + Family Yoga, and IndoRow Instructor. She’s also an Institute for Integrative Nutrition Health Coach. Her promise is to bring energy, enthusiasm, and fun to every class, and wants folks to leave feeling rejuvenated, empowered, and energized.
When she’s not teaching at Rival, Kenzie leads children’s yoga classes and hangs out with her Golden Retriever, Sherman.
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Hailing all the way from North Carolina, where she worked as a trainer and instructor for several years before moving to Seattle, Hannah is an AFAA Certified Personal Trainer and certified TRX Suspension Training Systems Instructor. She is also certified in both combat and kettlebell with Strong First and achieved her Indoor Rowing Certification through Rival Fitness’s own program in April 2018.

She has an extensive background in gymnastics which eventually fueled her passion for functional movement and helping people realize their own potential through fitness, with the focus of moving well and moving often.

Her motto is, “always proud, never satisfied.”

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For Rival’s founder and owner Jim Mahan, his training career began as a natural transition from his passion for athletics. A collegiate track athlete, Jim graduated from the University of Washington with a degree in Business Administration and began a long tenure in human resources at Nordstrom. It was there that Jim decided he wanted to share his love of fitness with others, and so he achieved his Strength and Conditioning Certification through NSCA. While running his own personal training business, Jim developed FIT Squad, a results-proven group-training program. As the FIT Squad method took off, it was apparent that this was the start of building a fitness community. In 2013, Jim opened Rival Fitness’ doors for the first time and continues to teach classes in addition to personal training.

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Danielle Bregent holds an interdisciplinary Masters degree from the University of Washington in modern health practices. She carries endorsements in a breadth of formats including indoor cycling (through Keiser, Schwinn), kickboxing, step, bootcamp, Total Body Conditioning, VIPR, and Burn at the Barre. She has been in the industry for 13 years; received a Group Fitness Instructor Certification through The American Council on Exercise (ACE) and is a former IDEA and CanFitPro member.
Danielle was a master trainer with Savvier Fitness from 2014 to 2016. She has traveled internationally to lead initial instructor trainings in Above the Barre. She has been developing and leading initial and refresher training courses for instructors since 2014. Expect a challenging, evidence based workout made lighter through stories of her nerdy misadventures.

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Tammera’s great passion is to help guide students to find a healthy perception of themselves through exercise. As a former competitive gymnast, Tammera began practicing yoga to help stabilize her joints and prevent injury. She soon fell in love with teaching fitness. Her teaching practice incorporates physical elements of strength and flexibility, as well as mediation and psycho-education. Tammera’s education background includes a 200-hour yoga teaching certification, myofascial release, Above The Barre, NASM-CPT, Indoor Row with Rival, Schwinn cycle, pilaties, and USAG gymnastics. In addition to her fitness certifications, Tammara holds a Bachelor’s Degree in the Science of Psychology from Washington State University, a Master’s degree in Sport Psychology from John F. Kennedy University, and is currently pursuing a Psy.D./M.A. in Counseling Psychology at Northwest University in Kirkland. She currently owns a private practice working as Mental Skills Consultant for competitive athletes in Seattle.

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By day, Katie edits medical journals. By night, she teaches cycle classes, including our Cycle + Core on Mondays and Thursdays. Katie started her fitness instruction journey at 18 as a volunteer yoga teacher with the South Puget Sound Boys & Girls Club. Since then, Katie has become a certified instructor through YogaFit Levels 1 and 2, YogaWorks 200 hr., and Maddog Spinning.

Over the last two years, she’s led classes in Boston and Nantucket, Massachusetts and is excited now to bring her talents to Rival.

Her classes are based around mindful movement to create body-positive spaces with her deeply held belief that all people deserve to feel empowered within their own bodies. Katie has an advanced understanding of the biomechanics involved in cycling and is able to meet each individual where they’re at to help them build a lifelong practice of sustainable activity.

All Rivalers and guests are welcome to join Katie in Cycle + Core and are encouraged to come ready to sweat, work hard, honor their bodies, and not take themselves too seriously.

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Logan achieved his personal training certification with NCCPT and has been training for the past four years and coaching HIIT classes for about a year. A lifelong athlete, Logan pursued strength training after his collegiate football career was unfortunately cut short due to injury. In 2016, he was a qualified national competitor in the men’s physique division with National Physique Committee.

When it comes to his class, Logan makes sure first and foremost, that all his exercises are fun and can be altered across different ability levels. He likes to include strength-based, balance, plyometrics, and CORE exercises in every HIIT circuit he designs.

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A longtime friend of Rival founder and owner Jim Mahan, Mike immediately became a rowing class regular once Rival opened its doors in 2013. This prompted Jim to encourage Mike to become a rowing instructor himself.

Mike has now been teaching rowing classes for three years and his Sunday morning class remains a member favorite. Proper rowing form rules above all else in Mike’s class, and he enjoys incorporating speed drills and friendly competition.

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Shari has always loved to ride a bike and has been teaching indoor cycling since 2003. She has a primary certification through AFAA, a cycling certification from Schwinn, and stays up to date with workshops and courses. She’s also a member of the Indoor Cycling Association, an education resource for cycling instructors all over the globe.

In Shari’s Saturday morning Endurance Ride, participants truly work out with a purpose. Rivalers can expect a variety of drills with clear instruction about how hard, how fast, and how long they will work in each segment. Shari believes there’s nothing better than getting a group of indoor cyclists to connect to the ride and achieve a sense of exhilaration and accomplishment.

Outside of the cycling studio, Shari is a self-employed copyeditor/proofreader and an avid reader. She enjoys being outdoors and spending time with her family and friends.

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