Our Coaches
When you join GAIN, our coaches become your support staff. We’re here to teach and provide understanding, create accountability and make sure you’re being challenged appropriately.
Justin Miner — Founder & Head Coach
I’ve been coaching for more than a decade, but my path wasn’t a straight line. In college, I trained like an athlete who thought he had it all figured out—until back pain and burnout forced me to start over. Rebuilding my body from the ground up taught me what truly works, and that process still shapes everything I do as a coach today.
In 2014, I opened GAIN Strength & Conditioning with one goal: help people build fitness that lasts. Not quick fixes or six-week gimmicks, but strength, mobility, and habits that stand the test of time. Around here we call it reasonable fitness—and while it’s sustainable, it’s never easy. My job is to help people do big things, whether that means lifting for the first time, moving pain-free, or training for an ultramarathon.
Outside the gym, I’ve finished all 48 White Mountain 4000-Footers, run more than 20 ultramarathons, and I’m always looking for the next challenge. At home, I do the cooking (ask me about my eggs), am always reading some sci-fi or fantasy, and I take my dog, Clementine, everywhere. Above all, I’m a husband and dad—Hannah and our kids, Elliot and Nolan, are the reason I stay strong, run fast, and play the long game.
Taylor Reuillard
Taylor has been coaching at GAIN since 2017 and quickly became a cornerstone of the team. From day one, he shared the same philosophy: fitness should be simple, sustainable, and focused on the basics that truly make a difference. His mission is to help more people move well, stay strong, and build habits that improve health for the long run.
He earned his bachelor’s degree in Exercise Science from Saint Joseph’s College of Maine, where he also played baseball. That blend of education and athletic experience gives him the tools to meet people where they’re at—whether it’s learning the fundamentals, training around pain or injury, or building confidence step by step.
Outside the gym, Taylor lives in Amesbury with his wife Caroline and their dog Cocoa. He enjoys golfing, making music, and sneaking in the occasional run. Above all, he’s driven by helping people feel better, move better, and live stronger every day.
our coaches are here to help you achieve your goals.
