Meet the Squad

Trainer Stephen Cheuk portrait for S10 Training + Recovery
Stephen Cheuk


Creator of the S10 System, stressing bodyfat percentage and strength for body transformations, Stephen has trained professional athletes, military elite and celebrities. S10 is forged from his extensive health and nutrition education.

Trainer Jaws Nelson portrait for S10 Training + Recovery
Jaws Nelson


From hitting up a boxing gym in between Broadway shows to becoming one of Wilhelmina’s original fitness models, Julie “Jaws” Nelson has always been at the forefront of fitness trends. Jaws’ fitness philosophy has always been to mix hard work with fun

Trainer Nick Herodotou portrait for S10 Training + Recovery
Nick Herodotou

Body Composition & Strength

Hailing from Melbourne, Australia, Nick comes with over 10 years experience in the fitness industry. He has worked with national champion snowboarders, kayakers for the 2016 Rio Olympics, models, office workers, stay at home moms, and rehab clients. He holds a bachelor's degree in Psychology and Psychophysiology, accreditations in PICP Strength and Conditioning (Level 3), Athletes Performance, PIMST, Olympic lifting, Biosignature Modulation and has a Diploma of Advanced Nutritional Medicine. Nick specializes in body composition transformation for those wanting to change their body shape, strength, and conditioning for athletes.

Trainer Carolina Lombardo portrait for S10 Training + Recovery
Carolina Lombardo

Mobility, Conditioning, Pilates Instructor -

Originally from Brazil, living and training in NYC for 14 years. As well as a Personal Trainer, Carolina is a Pilates Instructor who is dedicated to inspire you to be the best version of yourself.

Trainer Beau Whitman portrait for S10 Training + Recovery
Beau Whitman

Strength, Body Composition & Performance

Beau is a passionate athlete, cancer recovery coach, and motivational speaker who is dedicated to helping cancer survivors and injured athletes make full recoveries. In addition to developing personalized fitness training programs, Beau motivates individuals to be vulnerable and share their stories in order to help them come back stronger both physically and mentally.

Trainer Arhelis Mercedes portrait for S10 Training + Recovery
Arhelis Mercedes

NASM/NASM Sport enhancement/FMS certified

Arhelis Mercedes is a fitness coach, personal trainer, and health lifestyle enthusiast. What drew him to the fitness industry was his own post-surgery rehabilitation, which he now specializes in helping his clients with. Arhelis thinks it is so rewarding to watch his clients start to move better, feel younger, and eventually live pain free. He is super passionate about all sports, but especially basketball! He is a dedicated NY Giants and Knicks fan (even through the hard times).

Trainer David Nso portrait for S10 Training + Recovery
David Nso

Strength and Conditioning

David has been a personal trainer for over 10 years in New York City. Originally from Cameroon, Central Africa. David studied at UMBC in Maryland earning his Bachelor’s degree in Biology, National Academy of Sports Medicine (NASM CPT, CES, PES specialist). David is known for working together with his clients to bring of the best version of themselves through his tailored programs. David is also an ex-professional soccer player.

Trainer Gregory Peguero portrait for S10 Training + Recovery
Gregory Peguero

Strength, Conditioning, and Mobility.

CFSC level 1 Certified FRC Certified. Originally from the Dominican Republic, Gregory found an early love for sports and fitness. Gregory is driven to teach and inspire his clients to reach their full potential through a combination of proper nutrition, exercise, rest, and stress management.

Trainer Briana Williams portrait for S10 Training + Recovery
Briana Williams

CPT, USATF, Kettlebell Concepts

Raised in New York City, Briana Williams is a trainer, run coach, and wellness consultant. In designing high-quality services and fitness programming, Briana uses the most effective training methods to improve clients’ performance and health, allowing them to surpass their goals. Her challenging training approach is well-informed by exercise science and experience, not influenced by the latest trends. Briana provides a technical and holistic training experience that optimizes relevant performance metrics, such as speed, strength, power, and body composition.

Trainer Sandra Sanchez portrait for S10 Training + Recovery
Sandra Sanchez

Movement Enhancement, Graston, Cupping, FRC (See Recovery Page)

Sandra Sanchez has been working professionally within the health/fitness industry for the past 25 years as a personal trainer, movement specialist, and soft tissue therapist. She has learned directly from Los Angeles Clipper Soft Tissue Therapist and world-renowned manual movement expert Lenny Parracino. She continued her journey and studied under world-renowned Physical Therapist Gary Gray and Dr. Dave Tiberio, PHD and became a Gray Institute Fellow of Applied Functional Science.

Trainer Christian Rodriguez portrait for S10 Training + Recovery
Christian Rodriguez

Strength, Conditioning

Christian is NYC native, and grew up with a passion for sport, fitness and health. With a bachelor’s in Health Sciences, he approaches training with positivity, working to strengthen his clients both physically and mentally.

Trainer Theodora Fouseki portrait for S10 Training + Recovery
Theodora Fouseki

Strength and Conditioning

Born in Nafpaktos, Greece. Studied at National and Kapodistrian University of Athens, Physical Education and Sports Science (BSc), focusing on the physiological responses during High Intensity Interval Training (HIIT). Publishing her first paper as a co-writer in 2021 at the Journal of Strength and Conditioning Research. Volunteer swimming coach at Special Olympics Hellas and taking part of events by the same organization for more than 2 years. Moved in New York City in 2020 and completed a master’s degree at Exercise Sciences (MSc) at Queens College. Worked as an intern at Iona College, part of the Strength and Conditioning team. Highly motivated in sports, member of a basketball team since for more than 11 years.

Trainer Shannon Decker portrait for S10 Training + Recovery
Shannon Decker

Strength, Mobility, Conditioning

With 10 years of group fitness and personal training an eclectic group of professionals, celebrities, influencers and everyone in between, Shannon is fresh from the LA fitness scene and she couldn’t be more excited to share her knowledge and passion of fitness at S10 and New York City. She’ll push you to your limits, help you hit your goals, and have you smiling the whole time.

Train With Us

Group Classes

Our signature group classes are fast-paced full-body workouts that will push you just out of comfort zone. Designed for strength and conditioning, this circuit will have you feeling the energy of group training, and is a great introduction to our methods and equipment.

See Schedule


Achieve your goals. Train 1-on-1 with our coaches and receive personalized, results-direct training. We’ll assess you regularly for strength, body-composition, lifestyle and diet to properly track your acheivements. We’ll push you through programs that will get you where you want to be. You’ll learn correct form, nutrition protocols and training programs that will give you the confidence to train by yourself too.

Contact Us


Memberships to S10 are vetted and limited to 100 only. Members are generally clients and have a knowledge of S10 form and etiquette. We cap our membership numbers to a ensure the gym is never too busy.

Contact Us


We test and measure your progress regularly.
That's how we know you are getting the results you want.
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