Group Fitness Inst / CrossFit Level 1 Instructor / Former Marine Sergeant :

I went into the Marine Corps right out of high school as an overweight football player and returned lean, fit and able to take on any challenge. The philosophy that was ingrained in me changed my outlook on fitness and being active. I started Corps Fitness with the philosophy of exposing people to the motivation and self realization I experienced in boot camp. I was pushed beyond what I thought was my limit and that redefined what I knew I could accomplish. In 1998 I was diagnosed with a degenerative nerve condition and as a result of my Marine Corps experience I only became more determined to make the best of my situation. My goal with Corps Fitness and the IM ABLE Foundation is to inspire others to look inside themselves to push forward despite their challenges. No Excuses…Just MOVE!

Training Experience
Former Marine Sergeant
While in boot camp, Chris learned several valuable lessons that would shape him as a young man and in the years to come, including one very special lesson from his drill instructor. During a group cadence run in boot camp, Chris’ drill instructor, Dave Hart, uttered five words that continue to echo in Chris’ head during his most difficult times: “Don’t quit on me, Kaag.”
Owner & Founder
Training Skills
  • CrossFit Level 1 Instructor 100 %
  • Group Fitness Instruction 100 %

Meet Other Trainers

Marshall got his start in Corps Fitness when Chris still taught classes in area parks and fields. Encouraged by Chris, Marshall entered the Got the Nerve Triathlon and since then competed in many triathlons up to the Half-Ironman Distance. Swimming the San Francisco Bay from Alcatraz is one of has favorite race memories. He teaches Functional Fitness for Runners, and Spin and Krank Class that incorporates spinning/kranking, plyometrics, and low-impact circuit training. Marshall also coaches Cross Country and Track and Field at Berks Catholic High School and is the owner of Peak Coaching.
    I enjoy training at Corps Fitness because the workouts are not only challenging but rewarding. I always leave with a heightened sense of accomplishment. I was immediately hooked and after the incredible change I saw in my mind and body, I now want to give back. My goals are to help others reach their goals, and have the same rewarding experience that I have had at Corps Fitness!!
      Gretchen got her start with Corps Fitness in 2006 and has been hooked ever since. She enjoys pushing herself to the next level and the quiet competitiveness of a group class. Some of Gretchen’s favorite exercises include pull-ups and kettlebells. Gretchen has been a CrossFit Level 1 Instructor since February 2012 and is currently teaching a few classes a week.