RSC Personal Trainers

Personal trainers help their clients by:

  • Assessing the client’s fitness level
  • Demonstrating the safe, correct way to use equipment like the Bosu, hand weights and exercise machines
  • Tailoring an exercise program to the client’s needs
  • Encouraging clients to adopt sound nutritional practices
  • Coaching and motivating clients
  • Providing one-on-one feedback and problem-solving


Angela Waddington

Angela decided to begin her career in the health and fitness industry as a personal trainer in 2001. She wanted to improve people's quality of life by increasing their strength, balance, cardio fitness and flexibility.

Her experience includes training a diverse population of youth through older adults and strives to come up with innovative workouts that are challenging yet never boring. Angela also teaches boot camp, cycle boot camp and stays busy with her three young children.

Certifications: ACSM Certified Health Fitness Specialist

Brad Gieske

Brad's biography is on its way!


Beth Thomas

Instructor Beth Thomas has a strong background in fitness. Her career began in 1996 at the University Fitness Center in Wisconsin, where she was the Group Exercise Director and an instructor for a variety of fitness classes. 

After graduating with a degree in Physical Education with a minor in coaching, she became a certified strength and conditioning specialist. She continued to teach and train at several health clubs, and competed in many triathlons, both sprint and Olympic distances.

In 2008, Beth moved to the St. Louis area and started at the RSC, where she is now an instructor. Beth’s background in teaching and competing gives her the experience and insight needed to develop safe, effective and fun workouts that are personalized for each client. You’ll also find her leading Dynamic Training, Cardio Dance Fitness and Boot Camp classes. When she is not training or working out, Beth enjoys spending time with her husband and four children.

Certifications: ACE Group Fitness Instructor and NASM Certified Personal Trainer

Trainer Heidi Witzke

Heidi Witzke

As a child, Heidi enjoyed participating in many sports and activities. From an early age she knew that she wanted a career in the field of athletics. Today she holds a degree in Exercise Science and she has worked professionally as a corporate wellness coordinator, personal trainer, group exercise instructor and running coach.

Good nutrition has always been important to her, but when one of her children suffered a health scare, Heidi decided to study the subject in depth.
“Nutrition is so very important,” she says. “What we eat literally becomes a part of us and can determine our state of health or disease. I believe that a nutritious, balanced diet promotes vitality and longevity, and it is one of the most important gifts we can give ourselves.”

Heidi likes to stay active. You’ll see her teaching group classes at the RSC. And she is preparing to train for her 16th marathon. When Heidi has time to relax, she like to read, cook and travel with her family.

Certifications: Group Fitness Instructor and Nutrition Specialist


Natalie Onuoha

Natalie is a highly self-motivated athlete with a unique ability to encourage her clients to push themselves above and beyond their "comfort level." Her considerable experience in endurance training, weight training, and core and stability training has translated into success with many clients

Throughout her life, Natalie has enthusiastically participated in physical fitness. She fondly recalls competing in a 5K race with her family when she was eight years old.

As captain of the rugby team at the US Air Force Academy, she led the team to the national championship competition. Currently, she leads her "team" of four children in a daily homeschooling adventure. If Natalie is not at the gym in the early morning hours, she's probably out running.

"I love to run," she says. "It's an efficient way to burn calories and relieve stress, and requires no coordination and only a pair of shoes." Although her favorite race distance is the half-marathon, she's run four marathons, and she's making plans to add to that number.

Certifications: Professional member of AFAA and a nationally-certified personal trainer and group exercise instructor


Sue Roland

Sue Rowland is living her dream and enjoying every minute of it. She retired from government service after a 30+ year career, most of it as a city clerk.

As an encore career, Sue is a certified Personal Trainer and Group Fitness Instructor through the nationally accredited American Council on Exercise. She is also certified as a Silver Sneakers instructor and an Aquatic Exercise Association/Arthritis Foundation Program Leader for water and land exercises. Sue is currently working towards becoming certified as a Senior Exercise Specialist. Sue loves helping people get healthy and fit in a positive and safe environment.

Sue is the proud grandma of four little boys, and her first granddaughter is scheduled to make her debut around Christmas of 2018. The grandkids are the main reason Sue and her husband relocated from NC to MO after they both retired. Home is where the heart is, and the grandchildren own Sue’s heart!

In her spare time Sue likes to spend time with family; take long walks, hikes and bike rides; play tennis, pickleball and basketball; lift weights; and customize workouts for her personal training clients and group fitness participants. She also likes to read fiction, especially mysteries.