At Interchange Athletics, we’re not just another gym—we’re a coaching-first community focused on helping people build strength, confidence, and long-term health. Whether you’re new to fitness or looking to regain your strength, we provide personalized training, expert nutrition coaching, and a supportive group environment to help you succeed. Our approach is simple: meet you where you are, provide expert guidance, and create a space where you feel welcome and supported. Our members choose to stay with us because they find more than just workouts—they find a community that keeps them motivated and a program that delivers real results.
Our coaching team at Interchange Athletics brings a wealth of experience, certifications, and passion for helping members reach their goals. All of our strength and conditioning coaches hold CrossFit Level 1 or Level 2 certifications, ensuring expert guidance in every session. Our nutrition coach provides science-backed strategies to help you fuel your body effectively. But beyond the credentials, what sets our team apart is our commitment to you—whether it’s tailoring a training program, breaking down complex movements, or simply checking in to make sure you’re on track. At Interchange Athletics, you’re not just another member—you’re part of the family.
Kim Sanders-Kothari
Owner
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My husband and I have owned Interchange Athletics since the beginning in 2015. We are probably not the kind of people you would expect to own a functional fitness gym. We are not competitive Crossfitters. We aren’t big body builders. We are ordinary people who love this community and have one mission and that is to change the lives and health of the people within our community. I am not a coach, only the owner. I leave that to the talented and passionate coaches I hire. I personally started my own fitness journey very late in life. I was the kid in middle school who dreaded PE class and was always picked last on teams. I HATED anything sports or physical activity. Never in a million years would I have been able to predict where life was headed for me. I share my personal story because I know I am not alone. So now here I am 50+ years old and absolutely loving this thing we call fitness. I do it because of the way it makes me FEEL. It helps me deal with stress and get better sleep. It gives me more energy, more mobility, more flexibility, more happiness, and more confidence. The feeling of the community within the gym is so powerful and important to human lifespan. (Yes, studies have actually proven this.) And I know that I am helping to set myself up for many years of being able to play with grandkids, when they come, travel the world, carry my own groceries and remain independent for decades to come…. The list is endless. This is what I want for my future and I am working towards it. What do you want for your future? What do you want to be able to do? What is your plan? I share my story because I know I’m not alone. If you’re someone who has never stepped foot in a gym or feels out of shape, I want you to know-it’s never too late. Take that first step, and we will be here to support you every step of the way. At Interchange Athletics, we’ve got your back, and we’ll help you reach your goals, no matter where you’re starting from.
Sam
Coach
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Certified CrossFit Trainer L2, NASM Certified Nutrition Coach, Precision Nutrition L1 Coach, ISSA Certified Personal Trainer and Nutritionist TRX Suspension Training
Megan
Coach
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CrossFit Trainer L1, TRX Suspension Trainer
Heather
Coach
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CrossFit Trainer L1
Ron
Coach
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CrossFit Trainer L1, ISSA Certified Sports Nutritionist, ISSA Certified Personal Trainer, ISSA Certified Health Coach
Brenda
Coach
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Spin and TRX Suspension Trainer
Christina
Coach
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CrossFit Trainer L1
Carl
Coach
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CrossFit Trainer L1
Strength, Conditioning, and Mobility – We’ve Got It All
Our gym is fully equipped to support your fitness journey, whether you’re focusing on strength training, functional fitness, or mobility work. We have a large rig, TRX straps, barbells, dumbbells, kettlebells, rowing machines, assault bikes, spin bikes, and GHD machines for well-rounded training. For recovery and mobility, we provide foam rollers, resistance bands, and stretching equipment. Whatever your goals, we have the tools to help you succeed.
A Spacious, Well-Equipped Gym Designed for Real Results
Interchange Athletics features one of the largest open training spaces in Fairfield, providing plenty of room for functional fitness, strength training, and mobility work. Our two large roll-up doors bring in fresh air for an open, energizing workout experience. With private bathrooms, designated member storage, a childcare area, and plenty of room to train, we’ve designed our space to be both welcoming and practical. Plus, with 24/7 access options, you have the flexibility to train on your terms.
Book Your Free Intro Session Today
Take the first step towards a healthier lifestyle with a free intro session at Interchange Athletics in Fairfield, CA! Our team will provide a personalized tour of our facilities, introduce you to our services, and help you start your fitness journey. Schedule your session now and experience firsthand how Interchange Athletics can support your goals.
