Build Muscle.
Lose Fat.
Reclaim Your
Strength.
1-on-1 strength training and flexible nutrition for men and women over 35 in Orange, CA — without living in the gym.
Your First Session
Is Completely Free.
Most people have been burned by a trainer before, so I don't ask anyone to pay before they've trained with me. Come in, do a real session, see how I coach. If it's not for you, you've lost an hour and gained a free InBody scan. Men and women, 20s through 60s — everybody starts the same way.
We Talk First
Ten minutes on where you're at, what you've tried, what hurts, and what you actually want. No sales pitch — I just need to know who I'm training.
Movement Screen
I watch you move through a few basic patterns to see what's tight, what's weak, and what we need to work around. Old injuries included.
You Actually Train
A real workout, scaled to you — not a sales demo. I coach your form rep by rep and explain why we're doing what we're doing.
InBody Scan
Body composition numbers so we know your real starting point: muscle, body fat, where you stand. No guessing, no scale-only nonsense.
Your Plan & Pricing
I walk you through what a program for you would look like and what it costs. Then you go home and think about it. That's it.
About An Hour
That's the whole thing. Bring shoes you can train in and a water bottle — everything else is handled.
Nathan "Nate" Castillo
B.S. in Kinesiology from Cal State Fullerton and 8+ years coaching real transformations. Works with men and women — a lot of them over 35 and busy — helping them build muscle, lose fat, and get their strength back through smart training and education, not guesswork.
Meet Nate →One Program.
Built Around You.
No cookie-cutter plans. No generic pamphlets. Everything is built specifically for your body, your goals, and your life.
1-on-1 Personal Training
1-on-1, in-person coaching in Orange, CA — men and women, all levels.
- 100% custom workout programming
- Online app access to your program
- Nutritional guidance & better eating habits
- Weekly check-ins with InBody analysis
- Form coaching, injury prevention, real education
Pricing depends on your goals and training frequency. You'll hear it at the end of your free first session — after you've trained, not before.
Claim My Free Session First session free · No card, no catchCustom Meal Plans
Add-on offering
Built around the food you already eat — modified for your goals. Not a restrictive diet. Ask about this at your free session →
Real People. Real Transformations.
A few of the men and women who put in the work. Tap through for the full stories on the Transformations page.
Straight From The Source.
Featured reviews from Yelp and Instagram video testimonials.
"I've gone to other trainers in the past and they're nothing compared to him. He won't cheat you or make you do some outrageous workouts — simple and straight to the point. If you're considering training with him, DO IT. You won't regret it."
"He stood out from the rest because he was correcting his client's form as he was recording. He actually cared. He's going to actually help you reach your goals and do what a trainer is SUPPOSED to do."
"Went from 190-something pounds to 176. Lost fat, gained muscle. Knowledgeable, and overall a cool guy. Recommend training with Nate."
Straight Answers.
Is the first session actually free?
Yes. No card, no deposit, no obligation. You come in, train a real session, get an InBody scan, and hear what a program would cost. If you decide it's not for you, you owe nothing and we part on good terms.
Do you train women?
Yes — a good portion of my clients are women, training for fat loss, strength, and getting out of pain. You won't be handed a pink-dumbbell workout, and you won't be the only woman in the room. Same coaching, same programming standards, built around your goals.
I'm completely out of shape. Am I too far behind to start?
No. Most people who reach out haven't trained in years, and plenty have never lifted at all. Everything gets scaled to what your body can do on day one. Starting from zero is normal here.
Do I have to be over 35?
Not at all. A lot of my clients are 35+ with careers and families, so I've gotten good at programming around a packed schedule — but I coach people from their 20s into their 60s.
What if I have an old injury?
Bring it up in your first session. I tore up my own shoulder training the wrong way, so this is personal for me. I screen your movement first and program around what hurts instead of pretending it isn't there.
How do I get started?
Text (714) 883-0165 or fill out the three-question form on this page. I'll text you back within 12 hours to lock in a time for your free session at 1900 N Tustin St in Orange.
Ready to Reclaim
Your Strength?
Three questions, fifteen seconds. I'll text you back within 12 hours to set up your free session. Everyone's welcome here — men and women, any starting point.
Rather just text? Text (714) 883-0165 — that's the fastest way to reach me.
You're in. 💪
Thanks for reaching out — Coach Nate will text you back within 12 hours to lock in your free session.