Where Strength Meets Compassion.
I'm Mercy Waithira Mwangi — a certified personal trainer, nutritionist (BSc Foods, Nutrition & Dietetics), and women's health coach based in Dubai. I help women lose fat and get stronger through customized weight lifting and nutrition programs — with empathy, science, and personalization at the core of everything I do.
“Every successful fitness story is backed up by Consistency, determination and the belief that progress is built one step at a time.”
Mercy Waithira Mwangi
CEO, MercyFit Hub
Why you're in safe hands
Your body deserves informed care — especially during pregnancy, recovery, or major lifestyle change.
BSc in Foods, Nutrition & Dietetics
University-level expertise in nutrition science
Certified Personal Trainer (NASM)
Internationally recognized gold-standard certification
Pre & Postnatal Coach — Active IQ UK
Specialized care for pregnancy & recovery
These qualifications allow me to coach women with confidence, care, and evidence-based precision — without shortcuts or risk.
What drives me
Core Values
Empowerment
I believe in empowering my clients to take control of their health and fitness journey. Every step forward is a victory, and I'm here to support you every step of the way.
Consistency
I know that lasting results come from consistent effort. My programs encourage daily commitment, helping you build habits that lead to lifelong success.
Sustainability
I promote sustainable fitness and nutrition practices that are not just quick fixes but lasting lifestyle changes for better health.
Holistic Approach
I recognize the importance of both physical fitness and proper nutrition in achieving overall well-being. My services focus on a balanced, well-rounded approach to health.
My story
My History
My Background & PCOS Journey
I'm Mercy Waithira Mwangi, a personal trainer and nutrition coach. My fitness journey began 15 years ago, with a simple goal to stay fit and healthy. But suddenly, my health took an unexpected turn. I was diagnosed with PCOS, which caused weight gain, acne, and hormonal imbalance.
Initially, I was overwhelmed, frustrated, and discouraged. But what first seemed like a setback pushed me to reclaim my health. Drawing on my Bachelor of Science in Food and Nutrition, I began experimenting with strategies that helped manage my health.
During this journey, I've achieved my goals, regained confidence, and discovered the magic of combining fitness and nutrition in overcoming health issues like PCOS.
Dubai: My Hub of Growth & Experience
I relocated to Dubai six years ago, where I developed skills that have empowered me to serve my clients effectively. Over this time, I have pursued certifications to enhance my expertise:
- International Certified Personal Trainer — NASM
- Pre and Postnatal Coaching with Active IQ UK
- UAE REPS certification
With this knowledge, I've coached over 1,000 women to achieve their fitness goals, transforming them into confident individuals with a healthy lifestyle.
Empowering Your Transformation!
Today, I help women who feel stuck and frustrated with their bodies. I understand how discouraging it can be when your body betrays you. I've been there myself. But I also know the magic that's possible when you have the right guidance and support.
Transformation isn't just about looking good. It's also about gaining confidence by taking control of your life.
- Step-by-step expert guidance to master the right techniques
- Personalized meal plans tailored for your nutritional support
- Customized workout programmes for faster and safer results
- One-on-one monthly check-ins to track your progress
- Flexible, home-based workouts that fit busy lives
Verified & Registered
Where Strength Meets Compassion
Mercy Waithira Mwangi is a certified female fitness trainer and founder of MercyFitHub, empowering women to build strength, confidence, and resilience through compassionate, science-backed programs. Specializing in prenatal and postpartum training, she offers personalized coaching for weight loss, muscle building, and overall strength, with flexible, home-based workouts that accommodate busy lives without requiring a gym.
UAE REPS Registered — Category A: Personal Trainer
I don't believe in pushing bodies — I believe in listening to them
Every woman's body is different. Every stage of life brings unique challenges — from hormonal changes and pregnancy to injury recovery and simply starting over. My approach is built on understanding, not assumptions.
I take the time to learn about your body, your history, your concerns, and your goals before designing anything. And I keep learning about you throughout our journey together.
There's no shouting, no pressure, no comparing yourself to anyone else. Just clear guidance, steady progress, and genuine support.
The experience
What working together feels like
Safe
Every movement is explained, every modification is available, and your comfort is the priority.
Supported
You're never alone in this. I'm here for the questions, the setbacks, and the celebrations.
Explained
I don't just tell you what to do — I explain why. Understanding builds confidence.
Never pressured
Your pace is the right pace. There's no rush, no judgment, and no comparison.
What clients say about working with Mercy
“From the very first session, I felt safe, supported, and confident. Mercy truly understands the female body.”
Sarah M.
Postpartum client
“She always listens, adapts, and never pushes beyond what feels right. I've never had a coach like this.”
Aisha K.
Prenatal client
Ready to start your transformation?
Book a free consultation and let's talk about your body, your goals, and how I can support you.
Book a Free ConsultationNo obligation. No pressure. Just a conversation.