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Nutrition and Wellness

Weight Management

We designed our weight management services to address the rising incidence of obesity—a condition that can lead to more serious conditions—in children, teens and young adults. Our goal is to provide young people with the right tools and nutritional information that will allow them to take an active role in managing their health—for today and in the future.

Eating Disorders

We provide evidence-based treatment for adolescents who struggle with anorexia nervosa, bulimia nervosa, binge eating disorder and other types of disordered eating patterns. Our team of experts customize each treatment plan to best meet the specific medical nutritional, and mental health needs of a patient.  Depending on the type and severity of the disorder, pateints are seen as often as needed for individual or family sessions.  Our clinical team includes adolescent medicine specialists, a registered dietitian, social workers, psychologists and psychiatrists.

Each young person is provided:

  • A comprehensive medical evaluation (including physical exam and laboratory tests)
  • Ongoing medical care by a adolescent medicine specialist
  • A nutritional assessment with ongoing nutrition counseling and education services by a registered dietician
  • An evaluation of emotional well being and mental health and ongoing help

Teen Fit

Teen Fit is a free wellness program focused on improving the physical and mental well-being of teens ages 10-26. To accomplish this goal, we combine exercise classes with nutrition education and skill building to challenge negative coping behaviors. Classes take place at the Mount Sinai Adolescent Health Center or the 92nd Street Y and include training sessions that focus on improving strength, flexibility and aerobic capacity. For young people with weight management needs, they can also meet with our Nutritionist and Social Worker who can help customize weight management plans. In this program, we combine nutrition education, mental health services and physical activity to support an overall healthy lifestyle.

What to Expect

We believe that every young person has the right to physical health and emotional well-being. That’s why we offer completely free fitness classes led by certified fitness instructors. You’ll also learn about mindfulness, healthy eating, coping skills and self-care during our special wellness classes throughout the year. Teen Fit is all about boosting your confidence. It can help you build muscle and tone your abs, reduce stress and anxiety, improve your self-esteem and body image and lose weight. Join Teen Fit by stopping by one of our free classes.

What should I know before my first class?

  • You must be 10-26 years old to participate.
  • All fitness levels are welcome.
  • Wear comfortable clothes and sneakers.
  • Bring a water bottle.
  • Remember to eat a meal 1-3 hours before class or a smaller snack up to 30 minutes beforehand.
  • If you’re not already a patient at the Mount Sinai Adolescent Health Center, please bring a letter from your doctor or proof of an annual physical. If you need a physical, you can get one for free at the Mount Sinai Adolescent Health Center.
  • Please bring signed consent form to your first class.

See the current class schedule here.

Got questions? Email Kristal Ruiz, LMSW at or call her at (212) 423-2918.

Meet the Teen Fit instructors!

Kristal Ruiz, LMSW

Kristal Ruiz, LMSW is a Social Worker at the Mount Sinai Adolescent Health Center. She holds a master’s degree in Social Work from Hunter College’s Silberman School of Social Work and completed a one-year intensive National Child Traumatic Stress Network program on Child & Adolescent Trauma. Kristal is interested in expanding the conversation around health and wellness to include mental, emotional and social health. She uses an interdisciplinary and holistic approach to promote a positive and affirming space in which adolescents can talk about challenges they face and work together to find solutions—while also having fun.

Kareem Collins

With a background in exercise science, Kareem Collins was introduced to the fitness community 16 years ago as a personal trainer and group exercise instructor at New York Sports Clubs. He has extensive experience teaching a variety of exercise classes and working with diverse clientele. He’s been involved in research at Long Island University and with their Platinum Sneakers Program for seniors. Currently, he works for the 92Y as one of two instructors conducting the Parkinson’s Exercise Program (P.E.P.) and also teaches classes at the Himan Brown Senior Center.

Kareem is the instructor for Boxing Skills and Drills and Total Body Conditioning.

Ken Watts

Ken Watts is certified by the International Sports Science Association (ISSA) as a Personal Trainer and by the Athletics and Fitness Association of America (AFAA) as a Group Fitness Instructor. He has over 25 years of experience in the health and fitness industry, and has been a Teen Fit Instructor since the program began. Ken is renowned for inspiring class participants to reach their practical fitness goals and wants everyone to know that, “when we take care of ourselves, the gift is prolonged wellbeing.”

Ken is the instructor for Power Flex and Breakout Body Blast.