We are a come as you are training community.  We want you to stop measuring what you want to lose, and instead realize what you have to gain. Strength, power and confidence!

We’re all about helping you realize how strong and awesome you are, no fads or quick fixes. We will meet you where you are at and push you to be more!

Don’t take our word for it - Check out the Yelp reviews from our members!


Women Doing Battling Rope Drill at  Adamas Strength and Fitness in Westmont, IL


It takes commitment to achieve lasting change, and sharing that commitment only makes it stronger. Our supportive community of works together to be better everyday.
Coach Personal Training Woman on the TRX at  Adamas Strength and Fitness in Westmont, IL


You’ve already got a million things going on in your life, so it can be hard to nail down a specific training program. Knockout makes it easy: We program the workouts, and you show up and train.
Man Doing Kettlebell Training at  Adamas Strength and Fitness in Westmont, IL


To make training a habit, you have to train with a purpose. That means learning how to move better and be stronger so you can gain the confidence and freedom that comes from having a fit mind and body.
The workouts are always challenging and empowering but my favorite part of this gym is the community.
- Member Natalie


Our coaches are trained by Owner and Heach Coach, Jessica Lewis, through our internship program and hold certifications from NASM. Our goal is to provide hands-on individualized coaching in a group training environment. We don’t criticize, and we don’t make empty promises. You’ll never hear us talk about diets or six-pack abs. We believe in body positivity. Building strength. Intuitive eating. Balanced living. And becoming your best self!

Above all else, we believe in you. We make it a point to know your name, strengths and goals. 

Jessica Lewis, Owner & Head Coach at  Adamas Strength and Fitness in Westmont, IL



Owner, Head Coach

Coach Jess is the founder and our fearless leader. She started ASF in 2011 to create a badass place for people to train and escape the BS of the mainstream fitness industry.

As the head coach, she oversees the club’s training program, staff development, and member experience. Her goal is to provide you with the environment, tools, and coaching necessary to live a strong, healthy life. She is also a lifelong lifter, StrongFirst Level 1 Kettlebell Instructor, two-time Chicago Golden Gloves Champion, and trained psychotherapist.

Jess graduated from the Illinois School of Professional Psychology with an MA in Clinical Psychology and received her BA in Criminal/Social Justice and Psychology from Lewis University.

Matt Lewis Assistant Coach at Adamas Strength and Fitness in Westmont, IL 60559



Assistant Coach

Coach Matt has been at ASF since 2013 and trained under the guidance of Coach Jess for the past 4 years. He trained by Coach Jess' side for 7 months during her StrongFirst training and demostrates high level strength & technique. He is a graphic designer and owner of Knockout Print Shop. He grew up playing hockey and has been an avide lifter his whole life.

Matt graduated from C.O.D. with a AAT in Applied Technology.

Melissa Lullo, Assistant Coach at  Adamas Strength and Fitness in Westmont, IL



Assistant Coach

Coach Lullo has been a ASF since 2012 and completed her one-year internship with Coach Jess in 2015. She is a middle school special ed teacher by day and strength coach by night. Her years of teaching experience give her the ability to break down techniques into easily understood movement patterns and help members safely master new skills.

Lullo graduated from St. Francis with a MA in Educational Leadership and received her BA in Elementary and Special Education from Lewis University.