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MEET STEVEN

WHO AM I?

FOUNDER AND HEAD COACH

Hi, I’m Steven Lowenthal, founder and head coach at Premier Endurance Coaching. I’m a passionate endurance athlete with years of experience in triathlon, running, and coaching athletes at all levels—from first-timers to seasoned competitors.

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Whether you’re looking to complete your first triathlon, smash a personal record, or find balance in your training, I’m here to guide you. My approach is all about building trust, creating a genuine connection, and providing you with a personalized plan that fits your life and goals.

WHY DO I COACH?

PASSION, PURPOSE, AND YOUR SUCCESS!

I’ve always had a passion for sports, starting with soccer in my childhood in Guatemala. I was fortunate enough to earn a scholarship to play soccer in the United States, first at a small college in California and later at the University of North Florida. After college, I stayed connected to the game through competitive adult leagues and coaching women’s high school soccer. But after tearing my ACL, I decided it was time to step away from soccer.

In 2017, a friend introduced me to triathlon, and I dove in headfirst. I completed three Ironman 70.3s and two full Ironman races in 2018, and I was hooked. The sport reignited my passion for competition and fitness. By 2021, I was coaching myself and my girlfriend (now wife), and soon I started helping others—family, friends, and eventually athletes all across the US, Canada, and Guatemala.

Coaching for me isn’t just about giving training plans; it’s about building trust with my athletes and helping them grow as individuals—physically and mentally. I’m here to help you train with purpose, stay accountable, and show up on race day stronger than ever before.

MY BACKGROUND

A COACH WHO INVESTS IN YOUR SUCCESS

  • 1st Place at the 2024 Ironman Florida

  • 15-time Top 5 Age Group finisher in both Ironman
    and Ironman 70.3 events

  • Competed in multiple Ironman World Championships and IM 70.3 WC

  • Started coaching athletes at all levels in 2021

  • Passion for building trust, accountability, and a genuine connection to help athletes thrive

MEET JENNIFER

WHO AM I?

CO-FOUNDER & COACH

Hi, I’m Jennifer Sylva, co-founder and coach at Premier Endurance Coaching.
I’m a working mom of three boys, competitive triathlete, and wellness advocate passionate about helping others find strength through structure, balance, and belief in themselves.

I bring a unique perspective to coaching—one grounded in real life, where time is tight but goals still matter. Whether you're chasing a finish line, striving for consistency, or learning how to fit training into your busy life, I’m here to support you every step of the way with purpose-driven coaching and encouragement that meets you where you are.
MY BACKGROUND

  • 2nd Place Woman – Ironman Florida 2024 &
    IM 70.3 Puerto Rico 2025

  • Many-time Top 5 Age Group Finisher (Ironman + 70.3)

  • Many Ironman and IM 70.3 World Championship Qualifier

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