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!


Heidi Witzke

I knew at a young age that when I grew up I wanted to work in the field of health and fitness.  My childhood was filled with lots of sports--swimming, diving, running and 10 years as a competitive gymnast.  Those years gave me an appreciation of the human body and how it works, and made me curious to learn much more.  I graduated with a bachelor's degree in exercise science, and have since worked in the corporate fitness field, as a marathon training coach, group exercise instructor and personal trainer.  I love working with clients as a trainer, and feel so privileged to have such an enjoyable occupation.  Motivating my clients during their workouts, and helping them achieve a better balance in today's sometimes crazy world is so rewarding.  I can't imagine doing anything else!

When I'm not training clients, I love to do yoga, run, cook, and spend time with my 2 wonderful kids.

Certifications:  ACSM Health Fitness Specialist, AFAA Group Exercise Instructor, AFAA Personal Fitness Trainer

Kevin Whitehead

After spending more than 15 years in Sales and Management I have decided to follow my passion for health and fitness by becoming a Certified Personal Trainer with the American Council On Exercise. Having overcome my own personal struggles with weight loss I understand how difficult it is for people to balance a busy work and personal life while maintaining their health and fitness.

As a resident of O'fallon for more than ten years I am truly excited about the opportunity to work at The Renaud Spirit Center. I look forward to meeting each of you and your families to learn more about your health and fitness goals and how I can help you achieve them.

Certifications: ACE-CPT


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


Rochelle Hewitt

After an amazing weight loss story Rochelle decided that she wanted to help others achieve the feeling of success that she now has every day. Her journey started in August of 2007 after realizing that at 279 pounds she had to do something or she wasn't going to be around for her kids the way she wanted to be. After a lot of hard work and determination Rochelle met her weight loss goal in April 2010 losing a total of 135 pounds! She is now an inspiration for anyone who meets her. She is truly an inspiration to her clients and the participants in her classes.

"This journey has truly has been a life change for me and my whole family. It takes perseverance and hard work, but it is so worth it!"

Certifications: AFAA group exercise and personal training


Tina Nelson

Tina has extensive experience in the fitness industry and is qualified to teach and train in several different formats. She has been a Fitness professional for 20+ years. She is a former presenter and master trainer for TurboKick and PiYo. She has been featured in the St. Louis Post Dispatch and on She has also worked in different fitness conventions and fitness trade shows throughout the United States.

I am the proud mother of three healthy and active kids. I’m very lucky to have a “job” that I love. Teaching people how to achieve their goals is amazing.

Certifications: NASM Personal Trainer and ACE Group Exercise Instructor