Colleen O'Brien lightening bolt

location-iconOutdoor & In-Home

About Colleen

I am a registered dietitian, personal trainer and wellness expert. My wealth of knowledge comes from a blend of life experiences, higher education, and years of working with people from all walks of life. I have an MS in Nutrition and Public Health from Columbia University and an undergraduate degree in Nutrition and Food Science.

I have worked as a personal trainer and group fitness instructor in New York City for the past 25 years along with holding certifications in Thai massage and as an Iynegar yoga instructor. I have also trained and competed in Muay Thai Kickboxing.

My career as a clinical dietitian has allowed me to work with all types of disease states including eating disorders, high blood pressure, diabetes, diverticulitis, Krohn’s disease, Celiac disease, cancer, eating disorders, strokes patients, HIV/AIDS and overweight/obesity.

My philosophy is that diet and exercise work together to create optimal health and wellness.

Areas of Expertise

  • Nutrition
  • Strength Training
  • Boxing
  • Posture
  • Kettlebells
  • Functional Training
  • Yoga
  • Massage
  • Kickboxing
  • Cross Training

NCCA Accredited Certifications

ACSM Certified Personal Trainer

Additional Certifications

Registered Dietitian, CDN State of New York, CPR/AED, Yoga Alliance certification, Obesity and W


MS - Nutrition and Public Health, BS - Nutrition and Food Science

Who I Especially Like Working With

Actors, Bariatric, Beginners, Bodybuilders, Brides-to-be, Cancer Survivors, Disabled, LGBTQIA, Men, Middle-aged, Models, Overweight/ Obese, Peri/Post-menopausal, Post-rehab, Rehab, Runners, Seniors, Student-athletes, Women, Youth

Medical Conditions Experience

ACL tear, Addiction, Alzheimer's, Amputation, Ankle Injury, Anxiety, Arthritis, Artificial Hips, Artificial Knees, Asthma, Autoimmune Diseases, Back Pain/Issues, Bad Posture, Bone/Joint Injury, Breast Cancer, Cancer, Cardiac Rehab, Celiac Disease, Congestive Heart Failure, Crohn's Disease, Dementia, Depression, Diabetes, Dialysis, Disordered Eating Recovery, Eating Disorders, Hamstring Issues, Headaches/Migraines, Heart Attack, Hernia, High Blood Pressure, High Cholesterol, Hip Pain/Issues, Hip Replacement, Hypertension, Hypothyroidism, IBD, Joint Pain, Joint Replacement, Kidney Disease, Knee Pain/Issues, Limited Mobility, Lower Body Pain/Issues, Menopause, Neck Pain, Neuropathy, Obesity, Osteoporosis, Piriformis Syndrome, Plantar fasciitis, Postural Issues, Prediabetes, Rheumatoid Arthritis, Rotator Cuff Issues, Sciatica, Scoliosis, Shoulder Issues, Stress, Stroke, Stroke recovery, Tennis Elbow, Ulcerative Colitis

Training Areas Served

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