Fitness for All. fitness for life.

Training for All

When we founded Knuckle Down Athletics back in 2013 in a small La Jolla home garage, we simply wanted a place to train where we could prioritize what was most important to us. We quickly realized that our values of passion, positive vibes, and the urge to be better than yesterday were something that much of our community wanted and needed. We quickly outgrew our first space and moved into the bright and spacious facility you see today. We set out to build a stronger San Diego and we're happy to say we've done just that and so much more! Knuckle Down Athletics, Home of KDA CrossFit, has become so much more than a gym. It has become a community of amazing athletes and coaches that lift each other up and push each other forward. No matter your experience or strength level, there is a place for you at KDA. Beginners and experienced athletes train in harmony in our facility. You'll be hard-pressed to find a more motivating and diverse group of people anywhere.

Train for life.

Schedule a free one-on-one fitness assessment and try us for an entire month FREE to see what Knuckle Down Athletics can do for you

Take a Look Inside

Come train at our state-of-the-art 5,000+ sq ft training facility conveniently located in San Diego just off Miramar Road – close to UTC, University City, Miramar, Sorrento Valley, Sorrento Mesa, and Mira Mesa. Upon arriving at our training grounds, you'll immediately notice that we've stocked our gym with the very best functional fitness equipment for our athletes. Come in for a free training session and meet our awesome diverse team of fitness coaches, nutritionists, and holistic therapists. We can't wait to meet you!

  • I was a CrossFit dropout from two other gyms in the Miramar/Sorrento area. The trainers at KDA are so tuned into each member, quick to make an adjustment and scale a movement to your strengths and weaknesses and are truly passionate about your fitness journey.

    Dan B.