ALL4FIT.

Online coaching · Est. 2019

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You used to be an athlete.

It's time to get that edge back.

I help people get in shape by cutting through the fitness industry noise and keeping training simple

Training built around your schedule — not the other way around

Work with me from anywhere — home, gym, hotel, wherever life takes you

Start with a free discovery call and see if this is the right fit

Book a free call
0
Years
Coaching
0
Clients
Transformed
CERTIFIED
Coach &
Nutritionist
NPC
Natural Bodybuilding
Competitor

Who this is for

Sound familiar?

You were an athlete. You knew how to work hard, push through, and perform. But life happened — the job, the family, the schedule — and somewhere along the way your body stopped keeping up with who you know you are.


You've tried programs before. Maybe even hired a trainer. But nothing stuck because it wasn't built for your real life.


This is different.

✓ You still have that competitive fire — your body just isn't reflecting it yet

✓ You want results without starving, skipping carbs, or living at the gym

✓ You're done with generic plans that don't fit your schedule

✓ You want someone in your corner who actually holds you accountable

Book a free call

Follow the journey

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The All4Fit Method

This is what actually
makes the difference

01

Structure

You don't need more information. You need a proven system tailored to your life. A clear plan so you always know what to do next and whether it's working.

02

Accountability

Most people don't fail because of effort. They fail because no one is watching. In this program you have personal support keeping you focused regardless of life's chaos.

03

A Real Game Plan

Your biggest challenge isn't the gym. It's the food, the weekends, and the cravings. You'll get a realistic nutrition strategy that actually fits your lifestyle.

This isn't just about abs. It's about showing up for your health, your energy, and your life every single day.

Client results

Real people. Real results.

These aren't fitness models. These are busy people who finally got the right system.

Ray Torres before and after Before / After

Ray Torres

Lost 45 lbs · 4th place NPC · Age 41

Ray came in with one goal. Get in the best shape of his life and prove it on stage. At 41 with four kids watching he lost 45 lbs, stepped on a competition stage for the first time, and took 4th place. His kids got to watch their dad do something most people only dream about.

★★★★★
Sarah Sposato before and after Before / After

Sarah Sposato

Lost 40 lbs · Still going 3 years later

Sarah almost didn't try. But she did. Six months later she lost 40 lbs and built a lifestyle she didn't know was possible. Three years on she is still going strong, thriving in her demanding nursing career, and reminding herself every day how far she has come.

★★★★★
Joel before and after Before / After

Joel

Full transformation · Age 40 · 12 weeks

Joel had enough of the jokes about his weight — even from his own family. At 40 he decided to take full control. In 12 weeks he completely transformed his physique, his mindset, and his confidence. The person in the after photo doesn't just look different. He feels different.

★★★★★

Schedule your workouts around your schedule.

Weekly workout schedules are customized by me and you for you, and they are modified as your plans change to get closer to our goals.

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Choose your path

3 ways to start

Most popular

1 on 1 coaching

A custom program, nutrition plan, daily check ins, and full accountability. Built around your life, not a generic template. This is where real transformation happens.

Work with me

Digital programs

Done for you training and nutrition guides you can start today. Free and paid options available. Get the All4Fit system at your own pace.

Browse the shop

Free workouts

Hundreds of free workouts on YouTube. Train with me anytime, at any level, from anywhere. No equipment needed to get started.

Watch free workouts

Free download

Not ready to commit?
Start here for free.

My Top 5 Secrets to Weight Loss

The exact framework I use with every new coaching client. Simple, no BS, and built to get you moving in the right direction starting this week. Drop your email and I'll send it straight to you.

No spam. No selling your info. Just the good stuff. Unsubscribe anytime.

My Top 5 Secrets to Weight Loss by Karl Mergille Free guide

Ready when you are

You already know
what you're
capable of.
Let's make your
body catch up.

The call is free. The conversation has no pressure. It's 20 minutes to find out if this is right for you.

Book your free call today

Free 20 minute call. No commitment. No pressure.

Karl Mergille All4Fit
That's me. Let's talk.

Got questions?

Frequently asked questions

Everything you need to know before you take the next step.

We start with a discovery call to learn about your goals, your lifestyle, and what has worked or not worked for you before. From there I build you a fully custom training and nutrition plan. We check in regularly through whatever communication works best for you. I track your progress, adjust the plan when needed, and hold you accountable every step of the way. You never feel like you are doing this alone.
Most people start feeling different within the first two weeks. More energy, better sleep, clothes fitting differently. Visible changes usually start showing between weeks four and eight depending on your starting point and consistency. Real body composition changes happen over three to six months. Anyone promising dramatic results in two weeks is selling you something that will not last.
Neither is required. Your program is built around whatever equipment and space you actually have access to. Gym, home, hotel room, or no equipment at all. I have helped clients transform their bodies in all of these situations. We work with what you have, not what you wish you had.
That depends entirely on your schedule and your goals. I have gotten clients incredible results training three days a week. We figure out what is realistic for your life and build around that. Consistency with a three day plan beats burning out on a six day plan every single time.
No. I do not believe in cutting out entire food groups or making you miserable. The nutrition plan I build for you is designed around your real life including weekends, family dinners, travel, and the foods you actually enjoy. We focus on building sustainable habits you can maintain for years, not just until the next occasion.
Most programs fail because they are generic. They are not built for your schedule, your stress levels, your food preferences, or your history. What I do is different because everything is built specifically for you and the accountability is real and ongoing. I am not handing you a PDF and disappearing. I am in your corner consistently, adjusting when life changes, and making sure you follow through.
Absolutely. Most of my best client transformations have been people in their 30s, 40s and 50s. Your body does change as you get older but that does not mean results are off the table. It means your approach needs to be smarter. Recovery, nutrition timing, and training intensity all have to be dialed in correctly. That is exactly what I specialize in.
Workouts typically run 45 to 60 minutes. Check ins with me take five minutes or less. Most of my clients are busy professionals and parents who do not have unlimited time. We make it fit your schedule, not the other way around.
You get a fully customized training program, a nutrition plan built around your lifestyle, regular check ins, progress tracking, ongoing plan adjustments, and direct access to me whenever you need support. This is not a group program where you are one of hundreds. You get personal attention from start to finish.
Yes and this is one of the areas I specialize in. You will have travel workout options, guidance on eating well at restaurants, and strategies for staying consistent when your routine gets disrupted. Traveling is not an excuse to fall off. It is just a different environment to work with.
Tell me upfront and we will work around it. I have trained clients with bad knees, back problems, shoulder injuries, and all kinds of physical limitations. Your program will be designed to avoid aggravating anything while still allowing you to make real progress.
Pricing depends on the program length and what is included. The best way to find out is to book a free discovery call. We will talk about your goals and you will get all the details then. There is no pressure and no obligation. I only take on clients I genuinely believe I can help.
All4Fit is for everyone. I have coached women to incredible results including fat loss, muscle building, competition prep, and simply feeling stronger and more confident. If you have goals and are willing to put in the work, we can work together.
Yes, especially if you are newer to training or returning after a break. This is called body recomposition and it is absolutely achievable with the right nutrition and training setup. I have helped many clients drop body fat while adding visible muscle at the same time.
YouTube workouts are built for a general audience, not for you specifically. They do not account for your injuries, your schedule, your nutrition, or your progress over time. And they offer zero accountability. Coaching keeps you in the game and moving forward consistently.
No experience needed at all. Whether you have never set foot in a gym or you are a former athlete getting back into it, the program starts exactly where you are. Beginners often see the fastest results because their body responds so strongly to new stimulus.
If you are serious about making a change, tired of spinning your wheels, and ready to follow a plan and be held accountable, you are a good fit. My ideal client does not need to be convinced that fitness matters. They just need the right structure and someone in their corner.
We get on a 20 minute call and I learn everything about where you are and where you want to go. If coaching is a good fit I walk you through exactly how it works. If it is not the right time I will still point you in a direction that helps. Either way you leave the call with more clarity than you had before.
Yes. There are hundreds of free workouts on the All4Fit YouTube channel you can start using today. I also have a free guide called My Top 5 Secrets to Weight Loss you can grab on this page. Start there, get a feel for how I coach, and when you are ready to go deeper the coaching option will be here.
I have been coaching for over 10 years. I am a NASM certified personal trainer and nutritionist and an NPC natural bodybuilding competitor. I have worked with thousands of people across all fitness levels, ages, and backgrounds. This is not a side hustle for me. This is my life's work.

Still have a question? Let's talk.

Book your free call