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Nephtwim Rosario lightening bolt

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About Nephtwim

I am a military veteran with 22 years of service and a dedicated fitness enthusiast.  My own fitness journey took different forms, some optimal and some not so much. I am no stranger to injuries and the consequences of inadequate rehabilitation. While I maintained a regular fitness routine throughout most of my adult life, I didn’t optimize my efforts and, as a result, experienced several pathologies that could have been prevented by a targeted systematic approach to training. 

I want to make a difference in people’s lives by helping them to improve their quality of life. Regardless of your background or exercise experience, I can help you improve your current fitness level. My specialty is teaching the body to move better and getting it stronger to handle daily life. 

My training philosophy is based on four pillars of fitness: Nutrition, Exercise & Movement, Supplementation, and Coaching. A targeted mix of all four tailored to your individual circumstances will maximize your chances of accomplishing your goals.  Let me help you take charge of your health.

My favorite client story

My mother is 67 years old. She has always valued wellness and taking care of herself. Yet, despite her best efforts at living a healthy lifestyle she has struggled with keeping excess weight off. I took her on as a client in June of 2020 to help her improve her general physical conditioning. Her flexibility and mobility improved as well as her strength and balance. One day, she had her hands full carrying laundry in her apartment complex when she slipped and fell on the hard concrete ground right on her posterior. She said that she immediately got up and continued with her chores, and never experienced any pain or injury as a result. She credited that to her improved fitness. At the start of September 2020, she asked me to help her lose 40 pounds. I designed a customized nutrition and strength training program that resulted in her meeting her goal within a healthy timeframe. She continues to train with me and maintain her weight loss.

My favorite exercise

Any exercise that does what it's supposed to do.

My favorite quote

Tradition is a wonderful thing; until it prevents you from doing things better.

My training philosophy

Multi-pronged approach to ensure your efforts are not wasted. Proper nutrition is vital to support the work you do with physical activity; you cannot out-train a bad diet. Sufficient activity levels and optimal movement mechanics create the stimulus for your desired changes. Supplementation fills the gaps created by the realities and stresses of life. Coaching will keep you motivated and focused on your goals.

My training experience

I have been a fitness enthusiast for over 26 years and a certified personal trainer and nutrition coach since October 2019. I have experience training seniors, an ultra-marathon athlete, and people with busy schedules.

Areas of Expertise

  • Nutrition
  • Strength Training
  • Weight Loss
  • Cardiovascular Conditioning
  • Corrective Exercise
  • Core and Balance
  • Flexibility and Mobility
  • Posture
  • Functional Training
  • Myofascial Release
  • Injury Prevention

NCCA Accredited Certifications

NASM Certified Personal Trainer

Additional Certifications

DotFit Certified Nutrition Specialist, NASM Corrective Exercise Speciaist


BS in Technical Management

Who I Especially Like Working With

Beginners, Overweight/ Obese, Post-rehab, Seniors

Medical Conditions Experience

Alzheimer's, Ankle Injury, Arthritis, Back Pain/Issues, Bad Posture, Chronic Pain, Hip Pain/Issues, Limited Mobility, Lower Body Pain/Issues, Obesity, Plantar fasciitis, Postural Issues, Shoulder Issues, Sleep Apnea

Additional Languages Spoken


I am a 68 year old grandmother and for almost 20 years I have being trying to lose weight with pills and bunch of diet offers and it was very frustrating. I did everything on the book even went to the doctor and asked him why I can not lose weight. He did a bunch of tests on me including thyroid and found nothing. Believe me when I tell you I tryed. I did excersise and walk 2 miles a day. I am blessed I found Mr. Rosario who understood right away what my problem was and asked for help. Nephtwim designed a program specially for me and my age and after 8 months with him following his plan an advise I went from 184 pounds to now 134 from size 16 to size 6 and I feel healthy and energetic. TY Mr. Nephtwim Rosario. I recomen him 100%.

Iris Luna Camacho

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