SFSU class of 2019
Armando graduated from San Francisco State in 2019 and carried that milestone into the next chapter of his coaching path.
Armando “Mando” Fonseca · Coach Nalgas
Hard work. Honest feedback. Room to be human.
Armando is a Castro Valley fitness trainer and glute specialist who coaches clients ages 20–92 one-on-one at Body Mechanix and online.
Who he trains
Built for the full schedule.
Armando says most of his clients are working moms: short on time, pulled in several directions, and still driven to reach another level. His answer is individualized work—not a canned class schedule—and a coach who stays involved in the decisions.
Armando is Built Well for Birth certified and specializes in one-on-one strength and fitness coaching for pregnant and postpartum women. Coaching is shaped to each client's goals, experience, schedule, and current capacity.
In-person sessions happen at Body Mechanix in Castro Valley. Online one-on-one coaching keeps the plan and accountability personal when sharing a room is not practical.
What drives the work
Elevate every visit.
Armando describes his purpose as helping clients leave each training visit elevated physically and mentally. “Progress is the name of the game” is the standard; accountability, individualized programming, hard work, humor, and the occasional well-timed trash talk are how the room gets there.
- ListenStart with the goal, the schedule, and the obstacle that keeps returning.
- BuildTailor the work to the person instead of forcing a generic plan.
- CoachUse direct feedback, form cues, accountability, and humor.
- ElevateKeep progress physical, mental, repeatable, and honest.
At a glance
Experience and specialties.
Body Mechanix
Body Mechanix has been Armando’s Castro Valley training home since August 2019.
Individual coaching
Armando works one-on-one with clients across decades, goals, experience levels, and starting points.
Built Well for Birth
Specialized fitness coaching for pregnant and postpartum women, shaped to the person and her current capacity.