Our instructors make all the difference in helping you bring 'power to your core'!  Decades of experience combine to provide you with an amazing class experience every visit.


An adventure seeker and fitness enthusiast, Cari Allen has brought core 3 to the St. Louis area!   In addition to teaching fitness classes for the past 20 years, Cari has also completed the Boston Marathon, Ironman Florida, Assault on Mount Mitchell and many other outdoor adventures.  Come and see what all the buzz is about and take your fitness to the next level with core 3!



Cheryl Waites has been teaching indoor cycling for 15 years.  She is passionate about making each class experience an opportunity for riders to "do more".  She believes that every rider, experienced or new, should leave a cycling class feeling like they have taken themselves farther than they imagined they could.  She is excited about the  the RealRyder technology and the benefits it will bring to cycling classes, including a better core and upper body workout.  Cheryl has competed in numerous triathlons, including 5 Ironman triathlons.  She is thrilled about sharing her enthusiasm for cycling and fitness at core 3! 


Kelly Goodwin grew up swimming competitively so it was a natural transition in college to get into triathlons.  After getting the racing bug, Kelly participated and rocked many distances from 10K, half marathon, full marathon, olympic and half ironman events.  Because of her love of fitness, she started teaching spinning and group exercise classes 8 years ago and then got her  AAFA personal trainer certification.  Known as 'killer Kelly' in some circles, she definitely packs a punch in her workouts but she truly believes it is important to find  balance - exercise for both mind and body


Cori Rootz is a native of St. Louis.  She is a certified Ashtaga and Vinyasa Yoga teacher and also has an extensive background in Pilates, corporate fitness and wellness and personal training.  She enjoys hiking, swimming, yoga and basically anything that gets her outside an moving.  As a core 3 instructor she hopes to encourage a mind body approach to fitness allowing compassion for ourselves and others both on and off the boards.  She believes that through strength, balance, focus and of course sweat, it is amazing what we can achieve.

Since Heather was young, Heather has been active in  team sports.  When she was a college student she started practicing yoga and was immediately hooked by the mental and physical benefits of yoga!  As her fitness path continued, Heather took her love for teaching beyond the elementary school classroom and became a RYT through Yoga Alliance and a cycling instructor.   Since 2010 she has been a group fitness instructor leading a variety of yoga classes, cycling classes and a fusion of both!  Heather is thrilled to bring her experience to core 3!



Jenny enjoys an active lifestyle and all sports.  She especially loves cycling, golfing, running and spending some time 'just beaching it' it in the sun.  She especially loves college football (Go Seminoles!), walking and loving on her dogs. She believes you don't have to look a certain way or have ultra athletic goals to get fit and feel good about yourself.  Fitness is all about the journey and progress you make ever day….not about perfection!  The secret is the begin and after that, the sky is the limit!