Our ENS Credit Classes Instructors lead a variety of fun popular classes!
- Antonio Mejia
- Antonio Brito
- Aryeh Feldheim
- Bill Aaron
- Cali Tolbert
- Chris Czarnecki
- Cindy Fifield
- Colin Bryant
- Donald Wang
- Flo Pierce
- Grace Gama
- Heidi Sarmiento Wilson
- John Nagel
- Kamau Jackson
- Ken Meryman
- Lonny Mitchell
- Luke Sternhagen
- Marcellus Walker
- Marguerite Davidson
- Megan Hollyfield
- Metin Meral
- Rodman Stuhlmuller
- Spencer Brady
- Stan Williams
Intermediate Weight Training
Antonio is the Fitness and Wellness Program Assistant at Aztec Recreation. After receiving his degree in Kinesiology from SDSU, Antonio has worked in multiple aspects of the fitness industry all around San Diego and has earned multiple certifications from National Strength and Conditioning Association, National Academy of Sports Medicine, and USA Weightlifting. Antonio specializes in functional training, performance enhancement, and Olympic Weightlifting he is currently a personal trainer at the YMCA Tobey Wells and pursuing his Masters in Kinesiology at Point Loma Nazarene University. Antonio is a firm believer in what does not challenge it will not change you.
Beginning Weight Training
Aryeh was born and raised in South Florida where he competed in high school sports and quickly developed a passion for fitness. After graduating from the University of Central Florida with a B.S. Civil Engineering, he spent four years in the Navy where he trained in multiple fitness modalities like Powerlifting and Crossfit. Aryeh is a certified personal trainer where he enjoys guiding people along their own fitness journeys. When he’s not in the weight room, you can find him at the beach, enjoying a hike, or spending time at a local coffee shop.
Bill Aaron received his Bachelor of Science degree from San Diego State University in Exercise and Nutritional Sciences with an emphasis in Fitness, Nutrition & Health. He is Head Cross-Country Coach at Kearny High, has coached cross-country at the intercollegiate level, and coaches marathoners. A marathoner himself, his personal best is 3hr and 31 min. He is also currently president of the San Diego Track Club.
Group Fitness Instructor Training
Cali is the Fitness and Wellness Coordinator for Aztec Recreation. She began teaching group exercise classes during her time in college at James Madison University and graduated in 2013 with a degree in Kinesiology, Exercise Science. She is a certified AFAA Primary Group Fitness Instructor as well as an ACSM Certified Exercise Physiologist. Her favorite formats to teach include cycle, strength based classes such as TRX, dance, and yoga but she enjoys teaching just about any format. One of her strongest beliefs is to make your heart happy which includes, but is not limited to, your physical well-being. When she is not helping and motivating others achieve their fitness goals, you can find Cali with her dog, Brodie at the beach, trail running, or hiking!
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.
Olympic Lifting & Sports Conditioning
Donald Wang is the Olympic Weightlifting & Sports Conditioning Instructor for Aztec Recreation. He received his Bachelors of Science from San Diego State University in Kinesiology in 2016. Sports has always been an integral part of his life, and his pursuit of human performance has led him to obtain certifications through National Academy of Sports Medicine and USA Weightlifting. He is currently the head coach of Legendary Weightlifting, a local competitive USAW club team here in San Diego. He is also a personal trainer at The One Health Boutique where their focuses are on rehabilitation, strength, and performance. Donald enjoys many things that life has to offer like traveling to new places, camping, hiking, eating, skating, surfing, photography, playing the guitar, and of course coaching! He is very excited to meet you and share his passion for health and fitness together!
Pilates, Posture, and Poses
M.Ed., M.A., Exercise Physiology
Flo is a lifelong teacher – from Middle School to the University, and from Active Adults to Law Enforcement Officers. For Aztec Recreation, Flo teaches Group Fitness Classes including Pilates and Barre Blast, emphasizing precision and posture. Taking a sequence of classes from Flo, you will get high level instruction to help move your Pilates practice to the next level. Flo holds certifications from ACE and ACSM with specialties in Pilates, Cycling, Yoga, PIYO, Barre, Gravity, and Aquatics. She would love to see you in her class!
Fitness Training for Women
Functional Fitness Training
Grace is the Fitness and Wellness Program Assistant at the Aztec Recreation Center. She graduated from SDSU with her Bachelors in Foods and Nutritional Sciences and is currently working towards her Masters in Integrative Wellness at Point Loma Nazarene University. Grace has remained active in many sports such as dance, cheer, triathlon and climbing. 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 good food 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.
Heidi Sarmiento Wilson
Self Defense Conditioning
Self Defense for Women
Heidi has been a fitness professional for over 25 years and currently is a member of the Health and Exercise Science faculty at the University of San Diego, Mesa College, Cuyamaca College, and Torah High School. She holds 2 Masters Degrees from SDSU; one in Public Health (MPH) and one in Exercise and Nutritional Sciences (MS). She is a 3rd degree Black Belt in Taekwondo and formerly ran a Taekwondo dojo with her late husband Grandmaster James A. Wilson. She currently trains in Hapkido with Grandmaster Stephen Hong and Aikijujitsu with Master Wayne Collins. Heidi is also a boxing trainer at Body By Discipline in Lemon Grove and Maxwell’s Boxing on Miramar Road.
While Heidi teaches academic classes in health, sports nutrition, and various fitness classes her true passion is teaching women how to defend themselves.
Goal Setting for Lifetime Fitness
John Nagel enjoys exercise & dancing. He is presently teaching the GPX classes, Spinning®, core fusion & cardio dance at the ARC. He has been teaching partner dancing for over 30 year. He graduated with a BA in Social Science from UCI and has an AS in accounting from Mesa College. John’s approach to fitness is to set a realistic goal and then methodically work toward it. Plan your work; work your plan. When it comes to dance, let the music move you.
Intermediate Jiu Jitsu
Kamau is a 4th year student at San Diego State studying Criminal Justice and Psychology. He started training “No-Gi” Jujitsu in 2002 and went on to traditional Gi Jujitsu in 2010. He currently trains at Honu BJJ, a Ribeiro school in San Diego. Kamau trains and instructs jujitsu with an emphasis on self defense, utilizing sport and traditional techniques as well as techniques derived from wrestling, judo and MMA. He strongly believes jujitsu is a game of human chess, utilizing technique and problem solving skills over strength and agility. The study of jujitsu teaches humility while instilling confidence, gets one in amazing shape while learning to not rely on physical attributes and it teaches how to win by understanding your losses. The smallest opponent can defeat the biggest by using angles and manipulating leverage, making it as much a thinking game as a physical sport.
Basketball Skills & Conditioning
Lonny is a current High School Varsity Basketball Coach at Patrick Henry High School. He brings over 20 years of experience as a player and coach. Lonny is a SDSU Alumni with a Bachelors of Arts degree from San Diego State University and former student-athlete from 1995-1999. He is also Director of the C5 Athletics Foundation, a non profit organization he founded in 2012 to support youth student-athletics of all ages, with a mission to Build Leaders through Sports. He has true passion for sports, athletics, and helping youth in the community. As instructor his goal is to improve every student in the game of basketball while also helping them become better people in the game of life.
Self Defense for Women
Tae Kwon Do
Marcellus Walker has 30 years of martial arts experience with varying degrees of expertise in multiple styles. He began his exploration of martial arts as a teenager studying Shotokan Karate in 1980, and from there he went on to study Kenpo, Kickboxing, Goju-Ryu, Tai Chi Chuan, Tae Kwon Do, Hop Ki Do, Judo, Capoeira, and Aikido.
Mr. Walker considers Tae Kwon Do to be his primary style. He began his Tae Kwon Do training in Santa Cruz, CA at Song’s Martial Arts Institute in 1990. He developed his love for this style under the tutelage of Grandmaster Soonho Song and several of the exceptional black belt instructors at the Institute. Mr. Walker spent several years competing in Olympic style sparring tournaments sanctioned by the United States Tae Kwon Do Association in the early 1990’s. Shortly after moving to San Diego, he began studying Tae Kwon Do under Grandmaster Suk Chung Kang where he earned his 4th degree black belt.
In 2000, Mr. Walker co-founded the martial arts program at San Diego City College with Professor Jim Colbert. The program has been very successful and continues to develop under Jim’s expertise. Mr. Walker also taught for Kang’s Tae Kwon Do Association until Grandmaster Kang retired in 2006. Today, Mr. Walker’s teaching style focuses on individual development of the physical, mental and spiritual body, and the practical application of martial art techniques for self-defense.
Advanced Swim Fitness
Beginning Swim Fitness
Intermediate Swim Fitness
Marguerite graduated from San Diego State University with a double major in Studio Arts and Film Production. Marguerite is a San Diego native, and has been involved in various aquatics programs from a very young age. She has extensive knowledge and experience with aquatic sports of swimming and water polo at both the recreational and competitive levels. Marguerite has over 9 nines years of aquatic instruction and coaching experience. She enjoys sharing her knowledge with swimmers and athletes of all ages, abilities, and levels. Marguerite is dedicated to creating a positive learning environment while implementing core values of safety, fun, and progression into her classes. She believes in emphasizing stroke refinement, new skill development, and healthy exercise habits at all swimming levels.
Hip Hop Dance
Megan’s love of jazz, tap, contemporary, and hip-hop dance began when she was 5 and has continued on in the present day. Throughout her years in dance, hip-hop emerged as her favorite both to learn and perform. Early in 2017, Megan’s journey has led to teaching group fitness, yoga, and dance classes at the Aztec Recreation Center. Now as an SDSU graduate and group fitness instructor, teaching a hip-hop class for SDSU students was an easy decision to make. She believes that dancing is key to building confidence, community, and creative expression, as well as having a little fun along the way. No matter your experience, just get up and dance!
Coach Metin received his master degree in Kinesiology from SDSU in 2015. Metin’s soccer career started in his early age and played youth clubs,high school, college and semi-pro level. Since he arrived to the USA 10 years ago he always pursue his passion for soccer. He has coached many youth teams, high schools, college and semi-pro team. He is also currently coaching youth clubs and semi-pro level. He won CIF high school championships in 2013, won league championships in high school, college and club tournaments. He loves teaching, developing and sharing his skills with experience to young athletes as a former semi-pro player. He believe soccer and other sports have to teach and learn in fun and competitive environment. Therefore he creates fun and competitive environment while he is teaching. He has National D license and goal keeper license. He is also a soccer official for 10 years and officiating other sports as a hobby such as lacrosse, field hockey and volleyball.
Spencer brings more than 20 years of experience playing, teaching, & coaching tennis at both the recreational and competitive level. Growing up in San Diego Spencer was active in multiple sports and began to focus on teaching and coaching youth tennis while in high school. Prior to coming to SDSU Spencer coached competitive tennis teams at both the high school and college levels while still teaching individual and group classes for players of all ages and abilities. Spencer brings a passion for the sport of tennis to his classes. He believes in a very technical and relatable approach to developing a player’s court skills, fitness level, and metal well-being as they improve their overall game.
Stan Williams is originally from Philadelphia, Pennsylvania. He began practicing Yoga in 1976 while a student at LaSalle College located in his home town. With a Bachelor of Arts Degree, he relocated to Diego and eventually started his own business importing art and decorative Porcelain from Limoges, France. Stan completed the rigorous Iyengar three-year teacher training program and taught as a ’teacher in training’ for several years before being fully certified in the Iyengar method. Today, with many years of experience he continues his ongoing training with senior Iyengar teachers and is currently teaching Group Fitness yoga classes at the ARC, at the Iyengar Yoga Center of North County and Full Circle Yoga in San Diego. Stan’s objective for ENS 143 Yoga Inversions is to teach the basic techniques of general poses properly and safely with emphasis on Salumba Sarvangasana (Shoulder Stand) and Salumba Sirsasana (Head Stand) as well as the many preparatory poses that help develop the strength and flexibility to do the poses properly.
Stan’s other interests include playing basketball at the ARC and volunteering at the San Diego Maritime Museum. He is currently a qualified sail crew member on the historic and gorgeous Star of India, a windjammer located at San Diego’s central embarcadero pier district.