

Diamond Physiques
Introduction
**ONLINE ONLY** - Thank you for your interest in my personal training service.
I work exclusively with clients online because it offers greater flexibility, accountability, and results compared to in-person training.
I bring over 25 years of experience in transforming physiques through nutrition and exercise, and I am:
-A certified personal trainer
-A certified nutrition coach
-Specialized in body recomposition and transformation
My holistic coaching includes:
1. Custom nutrition plans (macros, water, supplements)
2. Personalized training (progressive overload, hypertrophy, strength, endurance)
3. Goal-specific cardio routines
4. Daily accountability and motivation (7 days/week)
5. Weekly email check-ins and plan adjustments
I’ve helped many clients achieve real results—from improved health markers (e.g., A1C, cholesterol, insulin resistance) to reduced pain and greater body confidence.
All packages include:
-Nutrition plan
-Training and cardio programs
-Core workouts
-Stretching guides
-Supplement guidance
-Daily support and communication
Let’s get started and transform your life.
Your body is the one place you have to live forever—take care of it!
Overview
Background checked
1 employee
1 year in business
Business hours
This pro hasn't listed their business hours.
Payment methods
This pro accepts payments via Cash, Check, Venmo, and Zelle.
Services offered
Appliance type
Washer or dryer
Refrigerator
Dishwasher
Oven or stove
Property type
Residential
Commercial
Projects and media
1 photo
Projects and media
1 photo
Reviews
Customers rated this pro highly for responsiveness, professionalism, and work quality.
5.0
4 reviews
5
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Troy W.
Jun 11, 2025
I had the pleasure of working with Rob as my nutritionist and found the experience incredibly valuable. He took the time to understand my goals, lifestyle, and health history, and created a personalized plan that was both realistic and effective. Rob is knowledgeable, supportive, and easy to talk to. He makes nutrition approachable and sustainable. I highly recommend him to anyone looking to make meaningful, lasting improvements to their health.
Bill M.
Jun 4, 2025
I've known Rob Callahan Personally and professionally for over 15 years. During that time, I have observed Rob's commitment to health & fitness and his desire to assist and motivate everyone he comes in contact with!
Rob genuinely cares about your individual health and fitness goals and he has the skillset and experience to make a quantifiable difference in your life!
When you're ready to take your health & fitness seriously...Call Rob Callahan, an ISSA certified personal trainer, with a strong understanding of bodybuilding, body re-composition, nutrition, supplementation and general wellness!
Bill M - Portland, Maine
Sarah L.
Jun 4, 2025
Rob is great to work with! He really works with you and helps you find the right diet that works with your body!
Diamond Physiques's reply
Thank you Sarah! I really like working with you to help you achieve your goals!
Tyson W.
Jun 1, 2025
Rob was incredible to work with. I'm going to start back with him in the Fall.
Credentials
Background Check
Robert Callahan