Kyle Castelein
Online personal trainer

Fight for the best version of yourself

Train with Kyle

My story

Everybody needs someone in their corner.

Growing up I was always the bigger kid, but I never sat still. I played just about every sport, and eventually football, which is what first got me into a weight room. The guys around me pushed me to put on size and get strong. Having that goal, and having people pushing me toward it, is what kept me going.

It worked. The lifting packed real strength and size on me, and I climbed all the way up to 220 (image 1). There was muscle under it, but I was out of shape, and I sat at that weight for a long time.

Then I got into MMA, and I knew I wanted to compete. At 220 I was nowhere near my natural weight class. Cutting down wasn't about avoiding the bigger guys. It was about getting to the weight where my speed and skill actually give me an edge. So I went back to what built me in the first place: the people around me. My coaches and training partners knew what I was after, and they held me to it (images 2 and 3). That's how I got from 220 down to 155 (image 4), and it's how I still make weight and compete today.

These days I fight as an active amateur (image 5), with years of kickboxing, Muay Thai, and jiu-jitsu in me. I've taken some real damage along the way too. I tore my ACL, tore my pec, and did the long rehab all the way back to 100% (image 6). I also work a full HVAC job, so I know what it's like to try to train when you're already wiped from a nine-to-five and your body's beat up.

None of this happened because I'm special. It happened because I always had someone in my corner. Teammates who pushed me, coaches who wouldn't let me quit on myself. Almost nobody gets there alone, and I was lucky I never had to. That's who I want to be for you. Whether you've trained your whole life or you've never set foot in a gym, I'll keep you honest and make sure you show up for yourself.

Kyle at 220 lbs, in the cage

1 Me at 220

Kyle mid weight-loss

2 Losing weight

Kyle mid weight-loss, at the gym

3 Still losing weight

Kyle making weight for a fight

4 Making fight weight

Kyle after a fight, medal in his teeth

5 4th MMA fight

Kyle recovering from a torn pec

6 Torn pec

Work with me →

Training

What I can help you with.

Not sure exactly what you need? Most people aren't — that's what the first conversation is for. We'll figure out the right plan together. Here's the kind of work we do:

Weight loss

Drop it and keep it off

Bulking up

Add real size

Muscle & strength

Get genuinely strong

Conditioning

Build your gas tank

General fitness

Feel good, move well

Pad work

Sharpen up and sweat on the mitts

Mindset & motivation

Show up when it's hard

Accountability

Someone in your corner, daily

How it works

I coach in person around Decatur, Alabama and online anywhere else. In-person sessions are one-on-one — striking, pad work, strength, conditioning, or a mix, built around what you're chasing. Online, you get a program written for your schedule and equipment, plus form checks on video and a check-in that keeps you honest.

Every plan starts the same way: you email me, we get on a call, and I ask what you're actually trying to do and what your week really looks like. No two people get the same program, so there's no menu of packages to pick from. We talk first, then I build it.

Whatever your goal, it starts the same way — tell me where you're at and we'll build the plan together.

Tell me your goal →

Contact

Ready to start?

Email me and tell me what you're after. I read every message myself and reply within about a day — then we hop on a quick call and figure out the plan.

Email Kyle

korean.jesus.mma@gmail.com

Prefer Instagram? DM me there instead. @korean.jesus_mma