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Affirmation Fitness, LLC




Sarah Herren

BS Health Science

NASM Certified Personal Trainer

NASM Certified Nutrition Coach

GGC Prenatal/Postnatal Certified

It is my mission to make fitness a truly attainable lifestyle for everyone I work with. I hope to break down the former ideas of what Women's Fitness looks like; Prenatal and Postnatal Training, Strength Training, and focusing on how you feel rather than what you look like.
I surround my clients with accountability, support, fun workouts that are customized for their specific goals and ability, and additional tools and resources to make fitness fit your life.   

began working as a personal trainer and fitness coach in 2011 after graduating with my degree that focused on kinesiology and human movement science.  Over the past 10+ years I have worked with clients of all ages and abilities and began focusing on women's fitness specifically after realizing there is a major gap in this area. My goal is to educated women about how to safely transition into all of the stages of life. While my new mothers focus on caring for their children, I focus on making fitness more attainable for them.  In addition, I am able to offer safe transitions into fitness once released from their medical professional to begin a new meaningful program.


Having experience in my own personal fitness journey that have challenged me to learn more and grow has helped me meet the needs of my clients.  These experiences have lead to my appreciation for watching someone regaining control over their body, fitness affirmations, and acquiring a place in fitness. 

We have beautiful, amazing bodies. Let's all join together and feel amazing in our bodies. Let's start accumulating healthy habits to help you reach your goals in a safe and effective way!





One on One





"I began my Fitness Journey with Sarah many years ago and have always been impressed with her vast, growing knowledge base, ability to motivate and positive attitude during our sessions. I would highly recommend her if you want challenge, support and accountability - which is what she did for me!"



"Sarah is a great trainer that pays great attention to detail and form. She is motivating and pushes you to reach your goals. I highly recommend her for anyone with any skill level! Everybody’s journey is different and Sarah adapts training to your personal needs!"



"Sarah is a highly qualified trainer who works with you to meet your individualized goals. She makes sure you are doing things correctly and getting the most out of every workout. You will never get bored with her workouts as each ones presents new moves and challenges. She has a great personality and makes working out fun! If you want someone to hold you accountable and help you reach your goals look no further! Thankful for her!"



"Sarah really is the best. She is truly invested in you as a person and wants to see you grow, not just physically but mentally too. She has a wealth of knowledge and experience in her field, and knows how to ask the right questions so she can really get to know you, your needs and goals. This is not a cookie cutter type program at all, but tailored to you individually. I love that she specializes in postpartum recovery and she is such a positive inspiration for women!"



"Sarah was a huge help to me when I hired her to help lose my baby weight I couldn't seem to drop. She knew how to modify movements to accommodate a leg injury that limits me every now and then. She was the perfect amount of push I needed to make me not only lose the extra weight, but also get to where I felt really strong, which is just as important as losing the pounds. I was able to use my leg on stairs as it became stronger due to my workout regimen. She's passionate about making changes and being positive in mindset always. She's amazing at what she does!"



"Sarah was professional and knowledgeable. She made my workout challenging but also fun. Her detailed nutrition advice was beneficial for my health transformation. Great experience!"


Sarah P

"Sarah is a gem! She has an incredible knowledge base, but her personality is what makes her sparkle!"



"I have known Sarah for many years now. Our friendship began through mutual friends, and has been strengthened through celebrations, times of tribulation, and of course motherhood

Sarah has always had one mission, and that’s to help anyone she can. I started training with her off and on through the years, and even though I’m considered a friend, her willingness to help and her compassion has always floored me. She truly cares, she cares for her family, her friends, and her clients (who become friends)

Sarah’s extensive knowledge and hunger to learn more ensures that you receive the best at every session. If you’re looking for someone to help you transform your life, look no further."







Alton, IL & Virtual

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