Train like a boxer. Transform like one too.
Sydney Rose Miller is a certified personal trainer, nutrition coach, and decorated amateur boxer with 13 years of coaching experience. Her 90-day program has helped clients lose 30 pounds, win boxing matches, and rebuild their relationship with food.
Featured trainer for lululemon Studio. Coaching clients in NYC and online since 2016.
BUILT LIKE FIGHT CAMP
TRAIN LIKE A FIGHTER ANYWHERE
REAL COACHING. REAL RESULTS.
TRAIN WITH THE SBOX METHOD: HOME, BOXING & GYM.
30/42
CHALLENGE
30 MIN. 42 DAYS. 1 COMMITMENT.
TRAINING WITH SYDNEY…
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Justine, 40
“Syd doesn’t just coach you, she empowers you to fight for your best self. In the early stages of my transformation, the physical rigor was undeniable, but by the third month, the shift became internal. I found myself navigating new habits with ease, leaning into the discipline of my training, and reclaiming a sense of mental toughness I feared I'd lost since my collegiate athlete days twenty years ago.
Syd’s training helped me step into a feminine power, teaching me to honor the grit and fierceness required to lift heavier and push harder, while simultaneously nourishing the grace of the fighter within. She replaced restrictive food mindsets with lessons on how to fuel my body holistically with intention and intuition. I graduated from her program with a more capable body, mind, and spirit.” -
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Devon, 28
“SBOX nutrition designed a sustainable and regimented meal plan that I could follow after the three months with ease. The different meals gave me a nice variety of options and also helped understand how I should build out my meals to hit my macros. I also enjoyed that it wasn’t restrictive and didn’t feel like a diet, just a new way of life. Her meals were also delicious and fueled me right! I also loved that she was available to help pick restaurant menu food so I could enjoy a meal with friends and still eat within healthy parameters.”
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Miguel, 37
“I started the program and felt a big difference within 3 weeks. Through modification in my diet and new workouts I lost 15 pounds. The constant communication and check-ins also helped me out a lot and made sure I stayed on top of my goals. I learned that a small tweak in my diet by eliminating certain things made a huge difference. It’s great working with Sydney because she always answers questions I have about nutrition and boxing techniques and workouts as well.”
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Alyssa, 28
“Syd’s transformation program totally changed my life—I’ve always been active, but I never truly understood how to structure my workouts and nutrition to see the results I really wanted. By working with Syd, I lost 30 pounds in 3 months and went on to win my first amateur boxing match. More than a year later, I’m still applying the lessons I learned in the program to my meal prep and training all the time so the results aren’t temporary.
As a coach, Syd is a badass who will make you suffer every day… but you will love it, and she’s also somehow amazingly supportive and flexible to busy lifestyles. Train with Syd!” -
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Bri, 36
“Working with Sydney was a transformational experience. She was patient and flexible with all my individual needs, and the results I saw during and after this program were life changing! I couldn’t be more thankful, and with the knowledge she shared, I feel confident enough to move forward and continue doing the work to have a healthy body!”
SYDNEY ROSE MILLER
Your strength already exists.
I help you activate it.
Frequently Asked Questions
What is S:Box Training?
S:Box Training is a coaching program built around the structure and discipline of boxing fight camps, designed for people who want a real, measurable physical transformation. Founded and led by Sydney Rose Miller, a certified personal trainer, nutrition coach, and decorated amateur boxer based in Williamsburg, Brooklyn, S:Box offers a 90-day 1-on-1 coaching program, a self-guided training app, in-person personal training in NYC, and a 42-day group challenge. Clients train at home, in the gym, or on the road, with Sydney's programming guiding every session.
Who is Sydney Rose Miller?
Sydney Rose Miller is a certified personal trainer, nutrition coach, and amateur boxer born and raised in New York City. She began her career as a public high school English teacher before transitioning full-time into fitness coaching. Over 13 years of coaching experience across cycling, boxing, and strength training, she has worked with clients at all levels, from beginners to professional athletes. She was a featured guest trainer for lululemon Studio, where she led 21 classes in boxing, conditioning, meditation, and mobility. She trains in-person at FNT Boxing Club in Williamsburg, Brooklyn.
How is the 90-day program different from other online coaching?
The 90-day Individualized Transformation Program is built on the same structure Sydney uses to prepare for amateur boxing competitions. Instead of a general fitness plan, clients get a specific target date to train toward, the way a boxer trains toward a fight date. Every workout is fully customized with demo videos, the nutrition plan is designed for each client's body and goals, and the program includes weekly FaceTime coaching calls, direct coach access, and adjustments when life intervenes. This is not a PDF. It is a 3-month coaching relationship with a coach who has done this herself.
Is S:Box available outside New York City?
Yes. The 90-day Individualized Transformation Program, the S:Box Training App, and the 30/42 Challenge are all fully online and available to clients anywhere in the United States and internationally. Coaching calls happen over FaceTime, and all programming is delivered through the app with demo videos so clients can train at home, at a hotel gym, or anywhere else. In-person personal training sessions are available in Williamsburg, Brooklyn, at FNT Boxing Club.
How much does the 90-day coaching program cost?
The Individualized Transformation Program is $600 per month with a 3-month minimum commitment, paid upfront. That is $1,800 total for 90 days of fully customized training, personalized nutrition coaching, weekly coaching calls, and direct access to Sydney throughout the program. A free 30-minute consultation is available to anyone who wants to talk through whether the program is the right fit before committing.
Do I need boxing experience to train with S:Box?
No boxing experience is required for any S:Box program. The training is inspired by boxing principles, not a boxing skill requirement. Sydney has coached clients who had never worn a pair of gloves alongside clients who compete in amateur boxing. The programming meets you where you are. If you are a beginner, you will build conditioning, strength, and confidence. If you are experienced, you will train with the rigor and structure of a serious fight camp.
Does S:Box offer prenatal or postnatal training?
Yes. Sydney has specialized in prenatal and postnatal training and has coached clients through pregnancy, recovery, and rebuilding strength after childbirth. The S:Box Training App includes dedicated prenatal and postnatal programs. In-person sessions for prenatal and postnatal clients are available in Williamsburg. For 1-on-1 coaching during or after pregnancy, contact Sydney directly to discuss your specific situation.
What is the S:Box Training App?
The S:Box Training App is available on iOS and Android and provides access to Sydney's subscription-based training programs, including home dumbbell workouts, strength and lifting programs, boxing conditioning sessions, a 120-day fight camp program, and prenatal and postnatal training. The app also hosts group challenges that run on a regular schedule. A 7-day free trial is available for new members.
How do I get started?
The fastest way to start is to book a free 30-minute consultation through the calendar on this site. Sydney will ask where you are, what you are working toward, and help you identify which program is the right fit. If you prefer to start on your own, the S:Box Training App offers a 7-day free trial with no credit card required for the first week.
WORK WITH ME
come home to your body