Coach Michelle Brown – C.M.E.S, C.P.T

Owner of Gumsaba / Program Director

  • ACE Certified Medical Exercise Specialist
  • ACE Certified Personal Trainer
  • Certified Group Trainer
  • Gumsaba Head Instructor
  • Gumsaba Program Director
  • Corporate Fitness Program Director and Head Instructor CytoSport/Muscle Milk – Bencia, CA
  • TRX Level 2 Certification
  • HIIT Training Certification
  • Trigger Point Myofascial Certification
  • Full Contact Kung Fu World Champion 2009
  • National Full Contact Kung Fu Champion 2001, 02, 09
  • 2nd Degree Kung Fu Black Belt
  • 3X Tough Mudder Finisher
  • CPR/AED Certified

Coach Michelle Brown has been helping her clients make their goals a reality since 1998. She is truly passionate about her company Gumsaba! and spreading the joy of fitness. Michelle’s has 12 years experience training in Chinese Kung Fu and Kuoshu and has been a certified personal trainer since 2001. She has traveled the globe competing against fighters of all styles and managed to win the World Kung Fu Tournament in Germany in 2009. She is currently studying for her ACE Advanced Health and Fitness Specialist degree. Michelle also maintains our blog (link) and is a contributing writer to her local newspaper Alamo Today.

Michelle also enjoys yoga, trail running hiking and riding her bike with her husband Chad as well as and spending playtime with her dogs Molly and Marcus. Chad and Michelle maintain a permaculture organic garden,  and love to cook awesome unprocessed, nutrient rich vegan food!

When Coach Michelle isn’t getting her Gumsaba on, she loves to ride her bike to the Farmers Market, hike local trails, water-ski and snowboard, spend time with her family, tend to her garden, cook vegan delights, do cartwheels in random places, road trip with Chad and Marcus and write.


Coach Briana Christensen – C.P.T

Boot Camp Coach

  • NASM Certified Personal Trainer
  • Certified TRX Instructor
  • Level 1 CrossFit Trainer
  • Mobility Certified
  • CPR/AED Certified
  • Crossfit Regionals Competitor
  • USA Level 1 Lifting Coach

Coach Joel Isaac – P.T.

Boot Camp Coach

  • NASM Certified Personal Trainer
  • Gumsaba Certified Group Trainer
  • High School Football Coach
  • AAU Basketball Coach
  • Multi-sport athlete: football, basketball & tennis
  • Tough Mudder finisher
  • 2X Collegiate Intramural Flag Football Champion
  • Tae Kwon Do, Kickboxing, MMA Training Expert
  • CPR/AED Certified


Coach Jentry Lee Hull – P.T

Boot Camp Coach

  • Gumsaba Certified Trainer
  • Communications Degree, University of Colorado @Boulder
  • Currently studying to become a Registered Dietician
  • CPR Certified
Coach Karen Silverman

Coach Karen Silverman – P.T.

Gumsaba Running Club Leader/Boot Camp Coach

  • Gumsaba Certified Instructor
  • 1st Degree Richard Lee Kung Fu Black Belt
  • Richard Lee Certified Black Belt Instructor
  • Tough Mudder Finisher
  • 3 time Half Marathon Finisher
  • LCSW, Licensed Clinical Social Worker
  • CPR/AED certified

Coach Piper Harris – P.T.

Boot Camp Coach

  • Gumsaba Certified Instructor
  • Professional Ballerina
  • CSCS Certification
  • Chek Practitioner
  • NASM Certification
  • NCCPT Certification
  • Studied Kinesiology and Classic Ballet at University of Utah
  • Regional Personal Training Manager for Equinox
  • Outpatient Physical Therapy Assistant at Cedar Sinai Hospital