ABOUT US
Weight Room Sports Performance has one simple goal: provide the best possible training for all. It is no secret that collegiate and professional athletes have the best resources at their disposal.
So that raises the question - "Why can't everyone have access to those same resources?"
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The mission of The Weight Room is exactly as the name suggests: we provide you with all of the quality you find in a professional weight room. This means top level coaching from a credentialed professional possessing a degree in the field of exercise science. It means years of training youth and elite athletes, olympic medalists, weekend warriors, and individuals with special considerations like cancer, diabetes, and heart disease.
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So no matter your goal, let's meet at The Weight Room and get to work.
MEET THE TEAM
KEVIN KOSIS BS CSCS
Owner, Head Coach
Kevin is a Certified Strength and Conditioning Specialist based in Glastonbury, Connecticut.
With 10 years of coaching experience, Kevin has dedicated his career to designing and establish successful sports performance programming for youth athletes. Over the past decade he has worked with athletes ranging from seven year old beginners to Olympic level competitors. His ability to serve a wide range of athletes can be credited to long term programming models which enhance longevity of athletes throughout their entire career and utilizes an educational approach to ensure athletes LEARN how to maximize their potential. The world of sports performance isn’t black and white, but rather lives in the grey. His coaching style allows athletes to explore the grey in order to develop strategies that best work for them.
Kevin's area of expertise is preparing high school athletes for the demands of college athletics. While studying Exercise Science at Sacred Heart University, Kevin competed as a Division 1 track athlete. As his collegiate career progressed, he faced numerous season ending injuries. These injuries have served as an invaluable lesson, learning first hand the importance of establishing proper technique, good recovery and stress management strategies. These lessons influence every aspect of programming, from proper warmup, exercise selection, movement mechanics, and recovery strategies. He believes all athletic performance comes from a strong foundation of movement - like building a skyscraper, there is no 50th floor without a strong foundation.
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Throughout his career, Kevin has worked for companies such as Equinox, HealthFitness, local training studios, and is most notably responsible for establishing and overseeing competitive team training for 1000 athletes at Chelsea Piers Connecticut. Kevin has helped prepare hundreds of high school athletes for collegiate competition through strength, speed and performance training. By combining the nuance of technical mastery with an educational style, Kevin can get the highest potential out of any athlete.
Kevin has had the privilege of working with a wide range of athletes and programs including: USA Figure Skating, D1 swim programs (University of Virginia, University of Georgia, University of Texas, Dartmouth, Yale, Georgetown), Providence Hockey, Trinity Hockey, and many more. Athletes training under Kevin have reached as high as medalists at the Tokyo and Paris Olympic Games and World Record Holders.
When he’s not coaching athletes, you can find Kevin training private personal training clients or helping startups in the health, fitness, and sports performance fields. From cutting edge technology to streaming services, Kevin has helped establish new training protocols and techniques that will continue to influence the field.
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Credentials:
BS Exercise Science - Sacred Heart university
Certified Strength and Conditioning Specialist (CSCS) - National Strength and Conditioning Association
Safe Sport Certified Coach
USA Swimming coach
CPR/AED
Fully insured
Contact information:
Email: kevin@weightroomsports.com
Cell: 860-707-6593
Registered Dietitian
As a Registered Dietitian with a Master’s in Public Health and a certified Health Coach, I bring a compassionate and well-rounded approach to nutrition. My journey into this field was deeply personal—I struggled with an eating disorder, which fueled my passion for helping others develop a healthy relationship with food and their bodies. This experience has given me a unique perspective on how nutrition impacts both physical and mental health, making me especially attuned to the needs of those navigating eating disorders or disordered eating patterns.
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Beyond my focus on eating disorders, I specialize in sports nutrition. As someone who enjoys weightlifting and staying active, I understand how proper fueling supports performance, recovery, and overall well-being. Whether you’re an athlete looking to optimize your game or someone striving to find balance in their active lifestyle, I’m here to help.
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Outside of work, you’ll often find me walking my dog, discovering new trails, or experimenting in the kitchen to create nourishing and satisfying meals. My counseling style is client-centered and collaborative—I believe nutrition isn’t about perfection but about finding sustainable habits that honor your body’s needs and your personal goals. Together, we’ll build a plan that fits your life, supports your health, and empowers you to thrive.
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Specialties
Weight Loss, Diabetes, High Cholesterol, High Blood Pressure, Eating Disorders & Disordered Eating, Pregnancy & Postpartum, Pediatrics, Sports Nutrition, General Nutrition
Modalities
Meal Planning, Intuitive Eating, Accountability, Motivational Interviewing, Relationship With Food, Sleep, Exercise, Health At Every Size (HAES)
Insurance accepted
Aetna, Cigna, Golden Rule, Optum, Oxford, United Healthcare, United Medical Resources (UMR)
Seeing clients in
AK, AZ, CA, CO, CT, HI, ID, IN, MA, MI, NH, NJ, NY, OK, OR, PA, TX, UT, VT, VA, WA, WV, WI, WY