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Join a
community
that inspires.
Mettle Fitness Company is more than an online training and nutrition hub—it’s a results-driven community built to meet you where you are and push you further than you thought possible. With access to a personalized training app, customized programs, and direct guidance from Coach Derek Stern, CPT, CN—a certified Personal Trainer and Nutritionist—you’re never guessing, never alone, and never stuck. Every plan is tailored, every check-in is intentional, and every win is shared within a motivated, supportive community designed to help you build strength, confidence, and long-term sustainability. Click on this button below to schedule a quick 5 minute call at your convenience. Today is the day you are taking control to become a better version
of yourself.
The question I want to ask yourself is,
what are YOU made of?
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Discover Yourself.
Our Mission
At Mettle Fitness Co., we are dedicated to helping you achieve your fitness goals, whether remotely (100% online fitness and nutrition training), hybrid (using our app and in-person training together), or strictly *in-person.
*Our in-person training is strictly for our Washington residents at this time, notably the Seattle and surrounding areas. Please click here for current rates on packages.
Who We Are
We specialize in creating customized workout plans tailored to your individual needs, while focusing on your goals. We bring expertise and experience to guide you through every step of your journey, ensuring sustained motivation and support to reach your wellness aspirations. Once you begin, we are locked in and we do this together! You will never be alone on this journey, and our approach is with kindness, patience, communication, understanding, empathy, and equality is unwavering. Our online and/or in-person workouts are fun, exciting and challenging. Derek is also a Certified GLP-1 coach and supplier, so reach out if you are interested in peptide-enhanced weight loss. Have more questions? Click this button!
What Clients Say
