Built for nobody
Same workouts and same meals for everyone, whatever your goal, your job or your week looks like.
Build muscle, lose fat and get a plan that fits your life. 1-on-1 training at UltraFlex Fitness in Monrovia, or online coaching anywhere.
CALL OR TEXT 909-618-3756

A downloaded program was written for nobody in particular. It doesn't know your schedule, the food in your kitchen, or where you're starting from. And nobody notices when a week goes sideways.
Same workouts and same meals for everyone, whatever your goal, your job or your week looks like.
With no one asking how it went, one missed week quietly turns into a missed month.
When progress slows or life changes, a static plan stays exactly the same.
It starts with a free consultation. Billy then builds your training plan around your goal and your schedule. Online clients also get a meal and macro plan.
Train 1-on-1 with Billy at UltraFlex Fitness in Monrovia, or follow your plan online from wherever you are.
Online clients send a weekly check-in with progress photos or a form-check video. Billy reviews it and adjusts your training and nutrition, with messaging support in between.
Two ways to work with Billy. Both start with a free consultation.
In person at UltraFlex Fitness, Monrovia. Every session is 60 minutes, one-on-one with Billy.
In-person training requires an UltraFlex Fitness membership.
Book a free consultation ↗All-in-one monthly package for anyone outside the local area.
3 months to start, then month to month

CERTIFIED PERSONAL TRAINER | CHEK-TRAINED HOLISTIC LIFESTYLE COACH
I help people build muscle, strength, structure, and mindset on the journey to their peak physical form.
My path into this work started young. I began weightlifting as a teenager, and in my late 20s I trained and later coached Muay Thai for nearly a decade, working with kids, teens, adults, and competitive fighters.
Injuries from Brazilian jiu-jitsu eventually pulled me away from martial arts. What followed was a hard stretch. I lost my sense of direction, became depressed, gained significant weight, and developed poor habits. At my lowest point I decided to take my life back.
I lost over 50 pounds and returned to a structured, fulfilling bodybuilding lifestyle that now feels sustainable and hopeful.
That experience shapes how I coach. I understand how difficult it can be to get (or get back) in shape. I'm not just a trainer, I'm someone who has lived both sides and genuinely cares about your health and well-being. I'm personable and direct, and my main focus is hypertrophy training and lifestyle bodybuilding.
Billy's own story, not a promise of your results.
Training is a process. Here is a look at Billy's own bodybuilding practice and commitment to the work.



Images show Billy's personal training journey. Individual client results vary.
Tell Billy what you're working toward. He'll get back to you by text or email to set a time to talk.
CALL 909-618-3756 ↗
TEXT 909-618-3756 ↗
EMAIL COACHBWPINSON@GMAIL.COM ↗
1-on-1 training at UltraFlex Fitness, Monrovia (membership required). Online coaching anywhere.