We think our coaches are amazing and we know you will too! 


Growing up as a competitive figure skater, an interest in health and fitness came naturally to Calli but it wasn’t until she went to a Zumba class with her Mom that she ever considered instructing anything. She has always worked out lifting weights and doing interval training but rhythmic based workouts were what kept her interested and motivated. Calli was Zumba certified in 2010, Mad Dogg Spin certified on her 23rd birthday in 2015, and Bootybarre certified in 2017. She is also certified in Stages Indoor Cycling.

It was always a dream of Calli’s to do something more, something bigger - Something that she could serve others and reach them on many levels: mind, body, and soul. It was this drive and passion that created the dream and then the reality of Studio 619.


Steve Geduldig is a certified Cycle Fusion indoor cycling instructor who brings many years of athletic, fitness and coaching experience to his classes.  

He resides in Hummelstown with his wife, Jennifer and their two Cairn Terriers, Archie and Lena, and has two great adult children who periodically humor their father by attending classes.

He brings high energy and encouragement to class and his goal is to help all students realize their individual and personal fitness goals.


Colleen is a teacher, student, yogini, traveler, and a lover of hammocks and brussels sprouts. Her simple purchase of a Yoga VHS tape in 2003 was both her first experience with yoga and a turning point in her life. What began as a purely physical practice became a way to manage the stress of graduate school, and has slowly developed into an exploration of the mind, body and spirit.

After completing her Master's Degree in Early Childhood Education from Columbia University in 2010, Colleen earned her RYT-200 with Three Sisters Yoga and her Children's Yoga Certification from Karma Kids Yoga in Manhattan. She teaches a vinyasa-style practice that is designed to meet the needs of her students on any given day.  She also specializes in prenatal yoga. In addition, Colleen often incorporates essential oils into her classes in order to enhance and deepen the practice. Colleen believes that yoga is for everyone, regardless of age, physical ability, socio-economic status, or spiritual beliefs.  

A relatively recent transplant to Central Pennsylvania, Colleen is excited to join the Studio 619 community and foster a warm and inviting space for all!


Katelyn is a Hershey local who moved back to Pennsylvania after a 7 year hiatus. She graduated from Miami University of Ohio in 2014 where she spent 4 years as a Varsity figure skater representing not only the university but also Team USA on the international stage. After graduation, her sales career with The Hershey Company took her to Denver and then Seattle. Her most recent position has brought her home to a headquarter role in finance. Katelyn is trained on the Stages Indoor Cycling bikes and recently completed her BootyBarre BOUNCE certification.

Staying active and living a healthy lifestyle are passions of Katelyn’s. After retiring from the intense lifestyle of a college athlete, it was hard to find a workout that yielded results without spending hours in the gym each day. Barre, Cycle and Yoga have been the solution to that problem, which is why Katelyn wants to share her experience with others. Her goal is to unleash the potential of her students and show them that the time spent at the studio is an investment in themselves and should never feel like a chore!

Volunteering is another passion of Katelyn’s which is why she is involved with the following organizations: Fitness 4 Focus, CocoaPacks, Project Fellowship, and Central PA Figure Skating Club.


Diane Cerminara is a certified spin instructor. She has a passion for creating challenging spin rides and brings her years of athletics and coaching  to each class. Diane graduated from James Madison University and resides in  Hummelstown with her husband Bob. She has two adult sons, Dominic and Gennaro. In addition to teaching cycle and coaching field hockey, Diane enjoys working with the marketing and sales business owned by her husband and traveling, especially to watch her son wrestle for Muhlenberg College.


Terry received her 200-hour Yoga Alliance teaching certification through Free Spirit Yoga. Terry’s teaching style is gentle and introspective. Her classes embrace the interconnectedness of body, mind, and breath.

A mix of various yoga styles, Terry offers a welcoming space to soften, become present, and explore. The use of props is encouraged, and support and modifications are offered to those experiencing limited mobility.

When teaching she hopes for her students to find balance mentally, physically, and spiritually providing them with a practice that they can embody in their daily lives off the mat.


Angie has been practicing yoga for the last five years, and the excitement and empowerment of the practice was a driving force toward gaining her teaching certification in February of 2018. She believes that anyone can “do” yoga.  It’s not for the athletic, it’s not for the flexible, it is for anyone willing to connect to, and challenge, the capabilities of their mind, body, and spirit.

Her style of teaching is a dynamic vinyasa flow, developing a connection between the movement and the breath. The class builds through a sequence of movements and poses engaging the body and promoting the relationship of breathing and subtle meditation.   

Angie enjoys being active.  She continues to play competitive volleyball along with running, hiking, and anything that is a physical challenge. She completed her 250 hour training through Sangha Yoga in February 2018.


Kara took her first yoga class at a YMCA during a time when most people (herself included) knew very little if anything at all about yoga. 20 years later, she is pleased to see yoga has become so popular with many people now experiencing it’s benefits.  After completing a 200 hour Yoga Teacher Training through Free Spirit Yoga, sharing yoga with others has felt like a natural progression in her life.

The word “yoga” is generally translated to mean something like “union” or “connection”. Kara believes the ways these words can be interpreted within the context of a yoga practice is unlimited and ultimately personal.

Yoga in a class with Kara offers opportunities to explore connections between the body, mind, and breath in order to encourage those practicing to make the choices necessary to find the yoga postures or movements right in that moment and feel confident enough to do this even if it means doing something someone else is not doing.  Mindful movement, breathing, and intentional choices are part of each class she offers. These elements are the focus of her own personal yoga practice. Kara believes that connections to and within the self bring the ability to see and feel more clearly the connections among all that surrounds us.


Megan discovered her passion for cycling classes about three years ago when she took her first class with Calli. After having three knee surgeries, Megan was amazed that she had finally found a workout that she was able to do without pain. Megan became a Stages Indoor Cycling certified instructor in August 2017 and began teaching in January 2018.

When Megan isn’t teaching spin she enjoys spending time with her hubby and three fur children at their home in the country.


Julie has always lived an active lifestyle, enjoying the outdoors as well as group exercise classes. After a soccer injury she was drawn towards Pilates, Barre and Yoga. Following her rehab, Julie continues to use these methods as a focus in her daily fitness routine.

She studied Finance at Saint Joseph’s University and had the opportunity to study abroad in Australia.  During her time abroad, she realized the culture of work/life balance ‘down under’ and became passionate about bringing that lifestyle back to corporate America.  After returning home, she obtained a Masters degree at American University in Health Promotion Management. During her time in Washington, DC she discovered her love for Barre and was fortunate to have the opportunity to continue her practice upon returning to Central PA in 2014.

Julie’s love for health and wellness has driven her to empower others to achieve their best self, both physically and mentally, and have fun while doing so. Julie provides a high energy, fun yet challenging class motivating and inspiring clients.

Outside of teaching Barre, Julie is a consultant bringing wellness to employers and employees in the Central Pennsylvania area. Julie is a certified barre instructor through BarreAbove, an SCW certified Pilates instructor, Nutrition Education Certified, and a Certified Health Education Specialist.


Lizzy was born and raised in Hershey, PA. She studied public relations and dance performance at Roger Williams University in Rhode Island. Lizzy had the opportunity to study and apprentice for dance companies in NYC and London throughout her college career. She was a world ranked competitive Irish step dancer competing on the World’s stage in multiple countries. She currently works for UPS in the business development function.

Lizzy is a certified spinning instructor through Mad Dogg Athletics and a certified barre instructor through BootyBarre. Lizzy is also a level 2 certified ski instructor through PSIA. Lizzy’s cycle classes are a mix of high energy runs with heavy climbs all synced up to beat driven music with motivating and engaging coaching. Lizzy currently lives in Pittsburgh where she teaches at Psycle Fitness and enjoys guest teaching at Studio 619 when she is in town!