Glendale, Missouri

Kerri Simon's FITstl (Functional Innovative Training stl), located in Glendale, Missouri, is a small group personal training studio that provides an innovative approach to functional training and strength training.

Register for our Classes through PunchPass.
Your first class is FREE - please email for availability! 



This in an energetic workout that focuses on toning muscles and strengthening the core, with intermittent cardio intervals mixed in. A variety of full body exercises will be performed using the Bosu ball, dumbbells, and body weight. It is a fast-paced workout that will include bouts of lower-intensity and higher-intensity exercises. Participants will perform exercises for either a set number of repetitions or for a set amount of time. You will leave this class wanting to come back for more!  (55 min.)


TRX suspension training is the original, best-in-class workout that leverages gravity and your body weight to perform hundreds of exercises. Participants will push their limits while strengthening the cardiovascular system, toning muscles and building strength. The class is designed so that TRX strength intervals alternate with cardio bursts. Exercises can be modified for all fitness levels.  (55 min.)


This challenging interval-training class incorporates a variety of equipment such as, TRX, weights, Bosu balls, slam balls, and more! As you move through stations in this class, the upper body, lower body and core will be challenged and strengthened. You will burn calories while building strong lean muscle. Prepare to sweat and push yourself to the next level!  (55 min.)


30 min heart-pumping HIIT (high-intensity interval training) class using variety of equipment to challenge you and get you through a mid-day slump! (30 min.)


Balls, Bands & Sculpt is a lower tempo class that is ideal for all fitness levels. It is a total body toning class that has no hard impact on your joints. The class will focus on toning and strengthening all major muscle groups and will improve balance and  “whole body” coordination. A variety of resistance bands and tubes will be used along with medicine balls, slam balls, resistance balls, BOSU balls, etc... (55 min.)


Group classes can be purchased in packages of 10 for $150. EXPRESS classes can be purchased in packages of 10 for $100.

Now offering “FITstl Unlimited” - $160/month. Starts date of purchase and expires after 30 days. Available only through Punchpass

Class participants can register here using PunchPass. Due to the limited number of spaces available in classes, please note that there is a 12 hour cancellation policy. Also, no-shows or late cancels will be charged.  

Contact Kerri Simon for more information: or 314-422-6932