Gateway CrossFit

Specialties

St. Louis’ only Personal Training-​exclusive CrossFit facility! We specialize in scaling the power of CrossFit to your individual needs.

: First Visit Complimentary

: Perfect for All Fitness Levels

: No Membership Fees

: Individual and Small Group Personal Training

: Elite Personal Coaching of Complex Movements

We are a boutique personal training studio in Clayton, MO that utilizes the CrossFit training philosophy. Our goal is to share the incredible results we’ve experienced, with our clients. Our programming offers:

: Dramatically superior fitness and weight loss results, with highly efficient use of time.

: Customized programs for any fitness level – from the unconditioned to the professional athlete.

: Varied workouts that make fitness training fun and eliminate the tedium of traditional workouts.

History

Established in 2011.

In August of 2005, CrossFit, Inc. founder Greg Glassman wrote an open letter to CrossFit trainers entitled Fundamentals, Virtuosity, and Mastery. Virtuosity is defined in gymnastics as «performing the common uncommonly well.» Coach Glassman goes on to write, «Virtuosity is elusive, supremely elusive. It is, however, readily recognized by audience as well as coach and athlete… The novice’s curse is manifested as excessive adornment, silly creativity, weak fundamentals and, ultimately, a marked lack of virtuosity and delayed mastery… Physical training is no different.»

Gateway CrossFit enthusiastically subscribes to the simple, time-​honored principle of virtuosity. Our commitment is to provide a training experience so steeped in virtuosity and excellence that its merits will be obvious and compelling. Consequently, our clients will see results far beyond what they have previously experienced in any other fitness regimen.

Meet the Business Owner

John Seiler and Mark Whitener D.

Business Owner

John Seiler

With over 11 years experience in the fitness industry, 25 years of training experience, and over 8 years in CrossFit, John brings considerable expertise to Gateway CrossFit. John is a Certified CrossFit Trainer since 2007, CrossFit Olympic Lifting certified, and a Certified Strength and Conditioning Specialist with the NSCA. Join him at Gateway CrossFit for an elite personal training experience that is fun, effective, and motivating.

Mark Whitener

A former Marine Corps Fitness Instructor, Mark has turned his love for training on the civilian world. In addition to his military experience, Mark is a CrossFit Certified Trainer since 2007. He has a long history of athletic pursuits including football, track and field, and boxing. Join Mark at Gateway CrossFit and reap the benefits of his expertise minus the Drill Instructor attitude (well, most of the time.)