Select Your COach

All of our Functional Bodybuilding coaches are certified by Precision Nutrition, and have experience coaching athletes in Functional Bodybuilding training as well as nutrition. You’re in great hands!

Shanna Guzman has an extensive athletic background with a specialty in swimming. Post college she competed in olympic distance Triathlon, Master’s Swimming for The Olympic Club, and competed in marathons. As a Master’s swimmer she won a world Championship in the 200m Back in 2006 and multiple national titles from 2006-2012. She also qualified and ran in the Boston Marathon in 2013. In 2016 she started her journey as a Master’s athlete in CrossFit.

Shanna has coached age group swimming for Santa Cruz County Aquatics and Masters Swimming at Simpkins Swim Center.  She also provides personal training and individual program design for athletes that have a variety of goals, including competitive CrossFit. Shanna has been a Functional Bodybuilding Master Coach since 2014 and enjoys surfing and yoga.


  • Masters degree in Traditional Chinese Medicine
  • 6 years of professional Acupuncture experience
  • Coaching certifications: OPEX CCP & Chek Academy
  • Precision Nutrition Coaching Level 1

Rebecca Gartner has a background in collegiate soccer and basketball, using CrossFit style workouts to help her get in the best shape possible for her sport. She also fell in love with nutrition and quickly realized how important it was to properly fuel her body. After a debilitating experience with mold exposure, she realized her training style was no longer helping her; it was hurting her. Rebecca switched from high intensity training to a more balanced training program focused on health. Rebecca joined FBB as a Persist coach in 2022.

Rebecca takes a very holistic approach to nutrition and training. Her experience has taught her the importance of stress management, from a physical, psychological, and environmental standpoint. She doesn’t believe in quick fixes; slow and steady wins the race. Rebecca’s ultimate goal is for her clients to not just survive, but to thrive. She wants you to feel confident in your skin and at the gym all while crushing your goals.

Certifications: Precision Nutrition Level 1 + CFL1

Dominic Scalzo grew up playing sports and was competitive in lacrosse during college, where he studied Business Administration and Exercise Science. Following a period of addiction and recovery, Dominic found CrossFit and competed for 7 years while also coaching others.

Dominic continued his coaching education under James Fitzgerald, Jason Leydon, and others. He currently coaches athletes in Functional Bodybuilding to optimize their competitive performance. He also has extensive experience as a former vegan athlete and guides clients with many different nutrition protocols and preferences to succeed in their physical and mental goals.


  • WAG
  • Precision L1
  • Cornell Holistic Nutrition
  • Rutgers University – B.S. Nutritional Science