Meet the Squad
CPT, CFSC, FRC, Mad Dogg, USA Boxing
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
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.
Mobility, Conditioning, Pilates
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.
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.
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).
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.
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.
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.
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.
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.
Strength and Conditioning
Jack specializes in elite sports performance, burn fat/gain muscle, and glute development programs. As a former college hockey player and current Ice Cross Downhill Team USA athlete, he has trained under some of the best trainers and coaches in the world, alongside professional athletes, and at Olympic training centers. Jack’s unique skills and experience can help any age or gender achieve their fitness goals. Certifications include CPPS, FRCms, FRA.
Pilates & Mobility
A certified Pilates instructor, Brittni has has taught in studios of all types, including classical, contemporary and large group class formats. Brittni found her passion for Pilates during her early modeling days. Her goal is for her clients to love the way they feel after each session—toned in all the right areas, finding new ranges of mobility, achieving a deep core connection—feeling their best and strongest selves.
Strength & Conditioning
Nicholas Volos has an extensive background in the field of health, fitness and athletic performance. He earned his masters degree in Applied Physiology & Kinesiology and his bachelors in Nutrition & Exercise Science. He is a certified Strength & Conditioning Specialist while also holding various certifications by StrongFirst such as the Kettle Bell Levels 1 and 2, as well as their Body Weight certification.
Train With Us
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.