Group Fitness Instructors

Interested In Becoming an Instructor?

Alexandria Moler

Alexandria Moler

Alex Moler is an undergraduate student at SDSU majoring in Kinesiology, Fitness Specialist. In the future she plans on working in the sports medical field running her own consultant business and helping clients achieve their fitness and health goals. All things related to health and fitness became a passion of hers when she tore her ACL twice playing soccer. Rehabilitation and group fitness became a huge part of her life during her recovery from two knee surgeries. After attending multiple group fitness classes, she got her certification to become a group fitness instructor. As an instructor she hopes to inspire others to stay active, healthy and reach their fitness goals while participating in a safe and welcoming environment. Come join her on this exciting new journey, SDSU community!

Amber Laurie

Amber Laurie

Amber began practicing yoga in 2008, exploring various types of practice including Vinyasa, Bikram, Hatha, and Restorative classes. In September of 2018 she finally decided to deepen her practice and earned her 200-hour certification in January, 2019. Her classes have a strong focus on providing various options so that students can feel empowered to listen and respond to their own body’s cues and needs. Amber earned her bachelor’s degree in Psychology as well as her master’s degree in Psychological Science from California State University, Chico. She is now a graduate student at SDSU and is in the process of earning her master’s in social work. She hopes to utilize her knowledge in these areas to instruct yoga classes that support students in regulating their own nervous systems, connecting with their bodies, and feeling safe and happy in their own skin! Amber enjoys teaching deep stretch yoga, which allows students to increase their strength and flexibility—a great addition to any physical health plan!

Antonio Brito

Antonio Brito

Antonio is a lifelong athlete and student of human movement and performance. During his undergradute degree at SDSU Antonio discovered a passion for campus recreation by first being a participant of everything Aztec Recreation had to offer and eventually becoming an instructor his senior year. After completing his Masters Degree in Sports Performance from Point Loma Nazarene University, he began working for the United States Marine Corps as a Combat Fitness Coordinator. He hopes to not just train the people who come to his classes but educate them about their bodies capabilities. Antonio is a firm believer that strength is health. When not in the weight room Antonio can be found playing Dungeons and Dragons with friends.

Bethany Mendenhall

Bethany Mendenhall

Bethany was born and raised in San Diego, and graduated from SDSU in 2019 with a B.A. in psychology. She has been teaching both cycling and yoga classes at the ARC since February 2019. In addition to being a group fitness instructor, she is an ENS instructor and one of Aztec Recreation's Fitness and Wellness Program Assistants. Her love of fitness stems from a place of self-love and she firmly believes that one of the best ways to take care of yourself is to keep both your body and mind active and healthy. As an instructor, her main goal is to help you discover and celebrate how strong you already are, exactly as you are. When she’s not teaching at the ARC, you can find her hanging out at a local coffee shop or rocking out to live music!

Bob Mueller

Bob Mueller

Hello, my name is Bob Mueller. I'm a retired Naval Officer who has been an avid road cyclist for over 30 years. I don’t race, but enjoy long day rides in our local mountains. I’m a Sierra Club, Chapter Outings Leader for the Bicycle Section and lead regular rides of 40 to 100 miles for the Club. I have also lead organized bicycle tours in Colorado, Washington State’s San Juan Islands and Olympic Penninsula, Vermont and New York. If you want to develop muscles and form to cycle long and strong, check out my class and take a spin.

Chris Czarnecki

Chris Czarnecki

Christopher is a San Diego born athlete, and Aztec Alum. Upon graduating with a degree in Psychology, he became a certified yoga teacher through San Diego State University’s first Yoga Teacher Training. After 10 years of weight training and collision sports, Christopher found introspection, peace, discipline, and new kind of strength enhancement within yoga. Coming upon his 5th year of practice, his curiosity and persistence for improvement continues to refine his flow. Catch him practicing frequently and substituting for the variety of classes we have to offer at the ARC!

Cindy Romero

Cindy Romero

Cindy is a San Diego native and an SDSU alumnus, where she earned her BA in Communication. Her love for sports and fitness began at the young age of five and continued to play sports every year thereafter upon high school graduation. She went through the same question every young athlete goes through; how do I stay active and fit now? Luckily, as a freshman at a SDSU she discovered yoga at the ARC in 2011. She loved how yoga transformed her body mind and spirit and wanted to share this beautiful practice with others. One month after graduating SDSU, she received her 200hr Yoga Teacher Training certification in 2015 and recently completed her 500hr certification in April 2018, both at Prana Yoga Center in La Jolla, CA. Cindy is excited and honored to be back at her alma mater, where her love for yoga began and hopes to inspire her students the same way she was inspired after her first yoga class.

Cindy Solomon

Cindy Solomon

Cindy started teaching cycling classes at the Aztec Recreation Center in 2015 after falling in love with the group fitness classes and instructors as a freshman at San Diego State University. She grew up competing in all kinds of sports and will forever be grateful for all of the lifelong lessons she learned, including what it means to be a part of a team. She firmly believes and lives by the saying, “Teamwork makes the dream work.”

In 2017, Cindy earned her bachelor's degree in Kinesiology, and is happy to be attending SDSU again, for her Doctorate in Physical Therapy. Cindy believes in doing what makes you happy, for her that includes living a healthy and active lifestyle, pursuing her dream career of helping others on their fitness journey, as well as being surrounded by positive people and good friends. If you ever see her around, please do not hesitate to say “hello.” And of course, Go Aztecs!

Cole Davis

Cole Davis

Cole graduated from James Madison University in May 2020 with a B.S. in Exercise Science after dropping his business degree in lieu of pursuing his dream of a career in the fitness industry. During his years working at JMU’s University Recreation Center Cole worked as a manager, personal trainer, and group exercise instructor with clients of all different shapes, sizes, colors, & ages! He is a Certified Personal Trainer & Certified Exercise Physiologist with the American College of Sports Medicine. He also has experience teaching a variety of group fitness formats with a focus on Strength & HIIT. Cole loves helping individuals build self-confidence, strength, and comfortability within their own bodies. In addition to teaching group fitness classes, Cole is the Fitness & Wellness Supervisor for Aztec Recreation. 

Daniel Dominguez

Daniel Dominguez

Born and raised in Argentina, Daniel came to San Diego in 1997 to work as a Ph.D. doing research in the SDSU Psychology Department. He became an ARC member as soon as the gym opened and started practicing yoga regularly in 1999. Along the years, Daniel participated in yoga classes and yoga retreats with many wonderful instructors at the ARC, learning different styles of yoga. He obtained his yoga teacher certification in CorePower Yoga, in 2008. Around the same time he graduated from IPSB as a Holistic Health Practitioner and Massage Therapist. Since then, Daniel has been teaching yoga and doing bodywork in different institutions around San Diego and South America. In 2011, Daniel completed a SUPcore certification as a Stand Up Paddle (SUP) and SUP Yoga instructor through Surftech SUP Academy (SSUPA) and has been teaching SUP and SUP Yoga at Mission Bay Aquatic Center ever since. Daniel’s passion for Nature and traveling has brought him to teach yoga (volunteer work) and practice SUP in the Amazon (Peru), experience he plans to repeat annually before visiting family and friends in Argentina.

Grace Gama

Grace Gama

Grace is a dedeicated member at the Aztec Recreation Center who serves as the Fitness and Wellness Program Assistant, and as both an ENS and Group Fitness Instructor. She graduated from SDSU with her Bachelors in Foods and Nutritional Sciences and recently earned her Masters Degree in Kinesiology - Integrative Wellness from Point Loma Nazarene University. Additionally, she is a National Board Certified Health and Wellness Coach and Diabetes Prevention Lifestyle Coach. She believes that group fitness is a fun way to stay active as well as an opportunity to connect with like-minded fitness friends. During her free time she enjoys hanging out with friends, eating tasty foods and having good laughs. As an instructor, she aspires to be a good role model, as well as a friend, to her students looking to stay active and healthy throughout their college careers.

Jo-Ann Humphus

Jo-Ann Humphus

Jo-Ann is an SDSU alumnus, and earned her BA in Psychology. She has been a regular at Aztec Recreation since its opening and has been serious about her physical activity ever since. After taking almost all of the classes Aztec Recreation had to offer, Spinning® was the one exercise she couldn’t get enough of. Jo-Ann is a level 3 Mad Dogg Athletics Spin® Certified Instructor, holds an AFAA certification in Primary Group Fitness, and is also trained as a R.I.P.P.E.D and CoreBar instructor. She has been teaching Spinning® at Aztec Recreation since 2006, and uses rock and roll-based music for a fast-paced exhilarating ride, focusing on building endurance. Jo-Ann also teaches Circuit Challenge, a high intensity class guaranteed to push your limits. Jo-Ann really enjoys the physical and emotional benefits from teaching. "Having newcomers return, and become regulars is one of the greatest rewards I can receive. It’s a great cardio workout, and a wonderful way to start the day."

Julia Karczewki

Julia is a Child and Family Development major at San Diego State University and working towards a future career in Occupational Therapy. She is involved in Dance Marathon, Younglife, and is passionate about fitness. She discovered her passion for fitness through dance at a very young age. She is a skilled endurance athlete as she competes in both half and full marathons. As a group fitness instructor, Julia strives to create a welcoming environment while encouraging others to push themselves to be their best selves! In her free time, she loves to relax at the beach, hike, and hang out with friends!  

Kashmone Hamilton

Kashmone Hamilton

Kashmone Hamilton graduated with her Masters in Public Health in 2014 from San Jose State University. She began her fitness journey by practicing and performing dance. Kashmone began taking U-Jam fitness class in 2010. She received her certification in U-Jam Fitness in 2014 in San Diego CA. She is also a certified AFAA Group Fitness Instructor. Kashmone’s passion for dance and making fitness fun and engaging is the driving force as an instructor.

Katherine Sasseen

Katherine Sasseen

As a professional massage therapist and dancer, Katherine found yoga a fairly natural path of continuing education. She took her first class in 1995 and loved how it made her feel. The fact that yoga is good for people is a bonus. Katherine has been learning and practicing various styles of yoga ever since and began teaching in 1998, having apprenticed in the Vinyasa Style of White Lotus Foundation in Santa Barbara, CA. Katherine enjoys helping people find their own way in Yoga, helping bodies and minds to expand and heal and feels blessed to guide her students o discover the fruits of a regular practice. Katherine says she never stops marveling at the gifts Yoga brings. Katherine has been in the Healing Arts for 18 years as a Certified Massage Therapist, Yoga Instructor & Therapist, and Healing Herbal Practitioner. Namaste.

Visit Katherine’s You Tube Channel for yoga and pranayama videos.

Keith Van der Walde

Keith Van der Walde

Keith is a passionate athlete and is involved in activities as diverse as cycling, tennis, yoga, running, boxing, weight lifting and swimming. Always in search of the hardest and most efficient and strategic workout, Keith discovered Yoga Sculpt in 2013 and was immediately hooked. Blending weights with yoga postures, this class is every bit as fun as it is challenging, offering the full-body benefits of yoga, coupled with the metabolism boost and conditioning benefits of exercises that hit major functional muscle groups, enhance flexibility, tone, balance, and build core strength. Convinced that there is little better way to spend an hour each day, Keith regularly practices Yoga Sculpt and enjoys nothing more than providing the experience for others. By introducing themes in class that inspire and elevate his students, Keith provides an immersive environment that facilitates growth and reinforces the magnificent potential of each participant. Keith is an aerospace engineer and artist who has started a company around his inventions and believes there is no limit to what we are able to dream and achieve.

Lisa Lamont

Lisa is a Stott Pilates certified Pilates instructor and a Mad Dogg Athletics Certified Spinning® instructor. She has worked in the fitness industry for over twenty years.

Megan Hollyfield

Megan Hollyfield

Megan began practicing yoga in 2012 as a form of physical therapy.  Yet the more she practiced the physical postures; the more yoga became a refuge to work on her mental strength.  Apparent that the mind-body connection is invaluable, she dove into a teacher training to deepen her own practice.  Now a certified 200 Hour Registered Yoga Teacher, she hopes to share the benefits of focus, determination, and positivity to all her students.


After realizing she enjoyed teaching power, sculpt, and hot yoga classes, she started to branch out to teach other formats at the SDSU Aztec Recreation Center.  Megan now teaches many additional formats such as Total Strength, Barre Blast, and Cardio Dance.  Whenever you step into one of her classes whether to relax with yoga or workout, you will find a positive atmosphere and a class geared to challenging both the mind and the body.

Natalie Quinn

Natalie Quinn

Natalie is currently a student here at San Diego State. She is majoring in Kinesiology with an emphasis on physical therapy. She hopes to become a physical therapist while still teaching workout classes on the side. Natalie is a certified ACSM Group Exercise Instructor and SCW Barre Instructor. Natalie grew up playing soccer, tennis and dance, so she has always loved to move her body and stay active. She enjoys being able to work out with a group of people because everyone motivates each other to do their best and have fun. She is looking forward to teaching in-person classes because she primarily taught classes through zoom during COVID-19.

Nikki Winters

Nikki Winters

Nikki started dancing since she can remember and trained mostly in ballet. After she turned 18 she danced with various professional ballet companies. It wasn’t until she joined up with a company called Physical Rhythm Project that was ballet/hip-hop fusion that she found her love for street dancing. Sponsored by NIKE, she then taught hip-hop classes in Portland, Oregon and discovered her love for group fitness. She since has been teaching various fitness classes on both the West and East Coast, with various certifications since 1992 and has been teaching at Aztec Recreation since 2001. She currently is a Commercial Real Estate Broker, a wife to an amazing husband, and a mom to two awesome boys.

Sara McDonald

Sara McDonald

I began teaching Group Fitness in 1995. Back then, I was working on my Master's degree and found that I was in the gym all the time - why not get paid? I love TAKING group fitness classes and wanted to give back by hopefully making exercise an enjoyable and challenging experience for my students. I get such an endorphin rush from both taking and teaching classes and I hope the students come away with the same endorphin rush. I definitely feed off the energy of the students, and hope I reflect back that energy for the students. Wherever I move, the gym is always the first place where I feel most at home. It's a place not only to deal with stress, anxiety, and even the isolation of being in a new place, but also a great way to meet people and create a community for yourself. I’m very excited to again be teaching on a college campus! Just prior to moving to CA, I taught for the Duke Group Fitness program while working on my PhD. I like the idea that I'm helping students build the healthy habit of a lifetime of fitness and that over the years to come, they benefit as much as I have from being a devotee of group fitness.

What I teach: I specialize in cardio kickboxing, High Intensity Interval Training (HIIT), boot camp, body weight and strength training, and circuit training. All of my classes use original choreography. I appreciate the wide variety of classes offered at the ARC.

My interests and hobbies: As a marine biologist, of course I love the beach, the sun, salt air, and sand between my toes, and being on the water in a boat. My husband and I have renovated two historic homes. Despite the hard work and many challenges, it's very rewarding when you finally achieve the finished product. The older I get, the more I enjoy hanging out with friends at someone's house for game night or watching some good shows - probably sounds boring to most people, but I really enjoy it!

Sofia Parker

Sofia Parker

Sofia is an undergraduate student at SDSU studying Marine Biology and Environmental Science.  Sofia loves yoga because of its ability to heal the mind, body and soul. Every time she steps onto her mat, she learns something new about herself and world in which we live . Yoga has given her a greater sense of self worth, love and acceptance. Practicing Baptiste Power Yoga in particular has reinforced her belief that yoga is a personal journey to discovering and rediscovering ones inner power. Sofia hopes to share the manys gifts of yoga and inspire others as her teachers have inspired her. She has been a yogi for 6 years. In 2016 she received her Level 1 Teacher Certification for Children's Yoga, in 2017 her Baptiste 200 Hour YTT Certification and in 2018 completed a Teaching Mentorship with one of her favorite studios back home in New Jersey. She is looking forward to meeting you and spreading the yogi love!

Vie G.

Vie G.

Vie is a Women’s Studies Master Student at SDSU. She became interested in yoga, mindfulness, and meditation in 2018.  She loves how yoga allows one to combine elements of the mind and body.  Not only does she enjoy the physical benefits of yoga, but she loves how you can apply themes in class to personal life situations. Furthermore, deepening her yoga practice has helped her to cope with her own mental health issues. Her passion for yoga is what inspired her to receive her 200-Hour RYT certification in Vinyasa Hot Yoga.

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