Build strength

that fits your life

Poseidon Powerhouse Gym makes strength training personal, purposeful, and built for life.

Build strength

that fits your life

Poseidon Powerhouse Gym makes strength training personal, purposeful, and built for life.

Strength For Life

Meet The Trainer

Dionasys Kalentermidis

I’m Dionasys, owner and coach at Poseidon Powerhouse. I got into training because I’ve always loved fitness, but over the years it’s become about so much more than just working out.

One of my favorite parts about being a coach is helping people get stronger and watching that strength carry over into their everyday life. I’ve worked with everyone from people stepping into a gym for the first time, to busy moms and dads, to athletes trying to take their performance to the next level.

I started Poseidon Powerhouse because I wanted to create a gym where anyone can walk in and feel like they belong. You don’t have to be in shape already, you don’t have to know what you’re doing, and you definitely don’t have to be the strongest person in the room. You just have to be willing to start.

I love what I do because I get to see people surprise themselves. Watching someone get stronger, move better, build confidence and do things they didn’t think they could do is what makes coaching worth it for me.

My goal is pretty simple:

help you become stronger and more capable, inside and outside of the gym.

Meet The Trainer

Dionasys Kalentermidis

I’m Dionasys, owner and coach at Poseidon Powerhouse. I got into training because I’ve always loved fitness, but over the years it’s become about so much more than just working out.

One of my favorite parts about being a coach is helping people get stronger and watching that strength carry over into their everyday life. I’ve worked with everyone from people stepping into a gym for the first time, to busy moms and dads, to athletes trying to take their performance to the next level.

I started Poseidon Powerhouse because I wanted to create a gym where anyone can walk in and feel like they belong. You don’t have to be in shape already, you don’t have to know what you’re doing, and you definitely don’t have to be the strongest person in the room. You just have to be willing to start.

I love what I do because I get to see people surprise themselves. Watching someone get stronger, move better, build confidence and do things they didn’t think they could do is what makes coaching worth it for me.

My goal is pretty simple:

help you become stronger and more capable, inside and outside of the gym.

More Than a Workout. A

Training Plan Built Around You.

Personal Training

Workouts built around your

goals, fitness level, and lifestyle.

Not a one-size-fits-all plan.

Real Results

Build strength, confidence, and

lasting habits with structured

training and accountability.

Train with Purpose

Learn proper technique, stay

motivated, and understand why

you’re doing each exercise so

you can keep progressing.

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I definitely feel the difference! I can

easily carry my kid, its not a problem

anymore. He’s amazing and really fun,

and that keeps me coming back!

K. Client | 1 Year of Training

I had some issues with my back and my

shoulder. With Dionasys, I’ve been able to conquer those. I keep coming back

because I want to be very mobile when

I’m 92 years old!

N. Client | 4 Years of Training

I definitely feel the difference! I can

easily carry my kid, its not a problem

anymore. He’s amazing and really fun,

and that keeps me coming back!

K. Client | 1 Year of Training

I had some issues with my bac k and my

shoulder. With Dionasys, I’ve been able to

conquer those. I keep coming back

because I want to be very mobile when

I’m 92 years old!

N. Client | 4 Years of Training

I definitely feel the difference! I can

easily carry my kid, its not a problem

anymore. He’s amazing and really fun,

and that keeps me coming back!

K. Client | 1 Year of Training

I had some issues with my bac k and my

shoulder. With Dionasys, I’ve been able to

conquer those. I keep coming back

because I want to be very mobile when

I’m 92 years old!

N. Client | 4 Years of Training

Still having questions or unsure

if it's a right fit for you?

No Pressure.

No Commitment

Book a free consultation call where we will discuss, goals,

experience, and more!

4190 Bonita Rd ste 102, Bonita, CA 91902, USA

4190 Bonita Rd Unit 102 Bonita, CA 91902

(619)000-0000

[email protected]