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Functional Strength for Everyday Life

About Us
We are Renier and Juliannys, a passionate team committed to helping you build a stronger, healthier, and more functional life. Renier is a licensed personal trainer certified by Puerto Rico’s DRD, a CrossFit Level 2 Trainer (CF-L2), and a Precision Nutrition Coach. With over a decade of experience as a coach and a lifetime of training, fitness has been at the core of who we are for as long as we can remember.

Our Philosophy
At 4:13 Functional Training, our mission goes beyond aesthetics. Inspired by Philippians 4:13—“I can do all things through Christ who strengthens me”—we believe that physical training is about stewardship: caring for the one body God has entrusted to us. Strength, resilience, and functionality are at the heart of everything we do. Whether it’s improving day-to-day tasks or preparing for life’s challenges, we focus on helping you move better and live healthier.

Exercise is not just about looking good on the outside; it’s about building a body that supports a life full of vitality. When you prioritize movement, the external benefits follow naturally.

Parenthood and Fitness
As parents of two young children, we understand how challenging it can be to balance fitness with the demands of family life. Parenthood has shaped our perspective, teaching us the value of adaptability and consistency. It’s not just about staying fit for ourselves—it’s about setting an example for the next generation. We aim to inspire parents to embrace movement as a way to care for themselves and their families, building habits that last a lifetime.

Why We Train
We believe that everyone has a responsibility to move their bodies, no matter their age or background. Muscles that aren’t used deteriorate and lose function, but with consistent effort, we can maintain and even improve our ability to live functional, fulfilling lives. From youth to adulthood, fitness should be a cornerstone of a life well-lived.

One story that continues to inspire our mission is Renier’s experience with a client who, after losing significant mobility in his legs due to an accident, committed to consistent training. Over time, he didn’t just regain his strength—he went on to run again. This transformation reinforced the power of movement and determination.

Join Us
Our program is designed to meet you where you are and help you become the strongest, most resilient version of yourself. Let’s move, grow, and honor the bodies we’ve been given—together.

4:13 Functional Training Membership
Join Our Comprehensive Training Membership

Gain access to four transformative programs designed to fit any fitness level and equipment setup:

Functional Home Fitness: A never-ending program using dumbbells and kettlebells. Focus on bench press, shoulder press, squats, deadlifts, and core for effective, equipment-light workouts.
Functional Strength Training: Our core program for home gyms, CrossFit boxes, or regular gyms. Emphasizes squat, shoulder press, deadlift, bench press, and midline exercises for a complete strength training routine.
Functional NO- Equipment Training: Versatile bodyweight workouts that build strength, endurance, and flexibility anywhere, anytime.
Functional 30 minutes Fitness: Quick, effective workout program designed to keep you moving and energized in just 30 minutes. With timed exercises, it’s perfect for anyone looking to stay active without a long commitment.

Membership Benefits:

Flexibility: Choose or combine programs to fit your lifestyle.
Continuous Improvement: Programs designed for ongoing progress.
Supportive Community: Join like-minded individuals for motivation and support.
Transform your fitness journey with 4:13 Functional Training. Train anywhere, anytime, with the right program for you!


4:13|Membership

4:13 | Functional Training

Functional No-Equipment Training

Functional Home Fitness

Functional Strength Training

Functional 30minutes Fitness

WAIVER AND RELEASE OF LIABILITY.pdf

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"Practical strength training for moms, dads, professionals, and everyday warriors who want to feel strong, capable, and ready for real life."

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Work 1-on-1 with us and smash your goals.

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About Us
We’re Renier and Juliannys, a passionate team dedicated to helping you build a stronger, healthier, and more functional life. Renier is a certified personal trainer (Puerto Rico DRD), CrossFit Level 2 Coach, and Precision Nutrition Coach with over 10 years of experience. Fitness has always been a core part of who we are.

Our Philosophy
At 4:13 Functional Training, inspired by Philippians 4:13, we see training as stewardship—caring for the one body God gave us. We focus on strength, resilience, and functionality to help you move better and live healthier, beyond just aesthetics. True fitness supports a vibrant life.

Parenthood & Fitness
As parents of two young kids, we know how hard it is to balance family and fitness. Our goal is to inspire parents to build lasting healthy habits—for themselves and their families—by embracing movement as a priority.

Why We Train
Everyone deserves to move well at any age. Consistent training maintains and improves function for a full life. Renier’s client story—regaining mobility and running after an accident—reminds us of movement’s power and purpose.

Join Us
Our program meets you where you are, helping you grow into your strongest, most resilient self. Let’s honor our bodies and move forward—together.

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"I actually look forward to working out now!"

"I stopped ghosting workouts when I joined this squad."

It’s not just a workout. It’s strength for real life, shared with real people.

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"Connected online, stronger together — results multiply when we show up as one