About Us
Our Story
Are you ready to experience the ultimate workout as you join the Core Fitness Family? Located on the brick street in Zionsville, Jamie and Shelly (and their two littles) started the studio in 2022 with the support of family, friends and loyal clients, and have since expanded to offer a variety of exciting workout styles. Our community is filled with amazing clients and our instructors are simply the best! And that's not all - we also have a recovery room with a full spectrum infrared light sauna and cold plunge, as well as featured clothing from Core Apparel, our retail store down the street. So what are you waiting for? Join us and let's get fit together
Meet the Team
Looking for the best in the industry? Our experienced and creative instructors are here to help you achieve your goals. Join us today and take your skills to the next level!
Michelle Petrowski
Shelly is a dedicated mom, wife, and fitness lover, as well as the proud owner of Core Apparel. After discovering Pilates Reformer, Shelly wanted to share her passion for wellness with others and opened Core Fitness in 2022. Her vision continues to evolve, as she now expands her offerings to include cycling, kettlebells, weights and hybrid routines, empowering clients to reach their fitness goals on a journey to a healthier, happier self!
Jamie Petrowski
Jamie Petrowski, known as Core Fitness' handy man, is a former NFL player, fitness guru and regional territory manager for Toro. With his passion for fitness, he brings high intensity kettlebell workouts to Core Fitness to encourage clients to push their limits. Jamie's dedication to health and wellness is evident in everything he does, inspiring others to live their best lives
Megan Howard
Megan Howard received her IM=X certification in August 2023 and has been working at Core Fitness ever since. She has enjoyed Pilates reformer classes for over 15 years. She loves the opportunity to gain strength and stretch all within the same workout! Megan recently got certified in spin and will be expanding her new expertise to the Core Fitness Family. She loves to be outside walking her dog or exploring new places.
Gretta Pote
Gretta Pote has been certified in IM=X Pilates since 2012 and has been teaching locally since that time. She began as a client and fell in love with the way reformer Pilates provides complete body wellness by challenging muscle development both in strength and flexibility. Gretta is the Directory of Bands at Clay Middle School in Carmel, IN and loves to spend time with family and friends!
Kimberly Collins
Kimberly Collins is a seasoned Pilates and cycling instructor with over 20 years of experience in the fitness industry. Trained and certified by prestigious programs such as Power Pilates, The Pilates Method, and Stott Pilates, Kimberly brings a wealth of knowledge and expertise to her classes. In addition to her Pilates qualifications, she is also a certified cycling instructor and a member of the The Pilates Method Alliance.
Tammy Bothwell
Tammy's yoga journey began when she took her first prenatal yoga class in 2002. Due to scoliosis, she sought out yoga in hopes of reducing her lower back pain which doctors said would dramatically increase during pregnancy. Yoga not only reduced her back pain but also increased strength, flexibility, body awareness, while reducing stress and so much more.
​
In 2008 Tammy completed YogaKids Foundations teacher training. She went on to complete her 200 hour Yoga Training with Niki Meyers and Marsha Pappas at CityYoga in 2009. Her passion for prenatal yoga expanded into teaching when she completed her Prenatal Teacher Training with Sarah Longacre in 2010. She is currently completing her 300 hour yoga teacher training with Kate Lombardo and Patrick Franco.
Yoga has been an important part of Tammy's life for over 21 years and she loves to share the many benefits of yoga with her students through creative classes designed to be accessible to every student in the room.
Lindsey Jay
I'm a wife to my husband Josh and mom to 3 beautiful girls- Lexi, Eloise, and Eliza. I've been teaching a wide range of group fitness classes since 2014 and personal training since 2019. In my spare time, I love to run and have ran 18 half marathons and 1 full marathon with more scheduled in the very near future. With my family, we love camping and often find ourself camping on the weekends during the summer. I'm excited to be teaching classes with this wonderful bunch!
Julie Greenlee
Julie enjoys teaching functional yoga classes which prioritize what the pose is doing for the body, rather than how it looks. She teaches classes for all body types and includes breath work and meditation. She emphasizes the ability to modify poses to suit individual needs and body limitations. Julie’s yoga journey began 15 years ago when she was trying to find an exercise program that would help with lower back issues. Initially, she found the stillness and silence of yoga almost unbearable. However, her mantra became simply, “stay on your mat”. Soon enough, she realized that is what yoga really is. Yoga is showing up for yourself and for life. Julie completed her 200 hour Yoga Teacher Training through Ahna Hoke Yoga in partnership with Blooming Life Yoga. In her free time, Julie likes to spend time with family and friends, walking her dog, reading, cooking and traveling.
Lauren Mansoori
Lauren started at Core Fitness as a client back in 2023 and loved the dynamic of the studio so much she became an instructor in 2024. As a busy mother of two wild little girls, Lauren uses her time at the studio as her creative outlet and thrives on the connections she makes with her clients. Her passion for Pilates comes through in her energy and routines. When not at the studio, you can find her at the soccer fields or tennis courts cheering on her girls or catch her traveling to different parts of the world.