Trainer Bios

 Stacey DeMartini turned her hobby of working out into her career during her Undergraduate degree at San Francisco State University for her B.S in Kinesiology.  She grew up playing and coaching competitive fastpitch softball and fell in love with the fitness aspect of it all. She has been around and worked with athletes in different settings such as coaching, physical therapy, and even Athletic Trainers for Stanford’s Football team. She moved from the West Coast to the East Coast to pursue her Masters in Athletic Training at Boston University while concurrently working at Equinox as a Tier 3+ trainer. Stacey always wanted to own her own fitness facility in order to help others better themselves, reach their goals, and build the strength and endurance to conquer anything. 

She has held her Personal Training Certification from ACE for the past ten years. She also holds certifications in Precision Nutrition, Sports conditioning and nutrition, Certified Functional Strength and Conditioning, Pre/Post Natal, Pain Free Mobility, and Kettle Bell Athletics (Level 1). 

Stacey has experience training all fitness levels. Her goal is to help you feel great, move great, and create better habits for an ultimately healthier lifestyle. 

I am a passionate advocate for fitness and mental well-being, with a lifelong love of exercise—and now thriving in my 50s with a deep focus on longevity. Certified as a personal trainer since 2018 and a life coach since 2020, I am committed to helping my clients reach their fullest potential, both physically and mentally.

I specialize in working with women through all stages of life—whether preparing for their wedding day, stepping into motherhood, or navigating menopause. My approach blends physical fitness with mental well-being, empowering women to feel strong, confident, and balanced for the long run.

As a proud member of the South Boston community for over 20 years, I value connection, support, and showing up for others—both inside and outside the gym.

As a mom, boot camp instructor, and personal trainer, I believe in challenging both body and mind. Whether it’s running with friends or lifting weights, my focus is on building strength, resilience, and sustainable habits that support lifelong health. My mission is to help you unlock your true potential so you can feel stronger, healthier, and more confident in every stage of life.