Strive & Uplift


On January 1st 2017, the RenFitness Gym opened in the Ballard neighborhood of Seattle!! This awesome new space allows us to expand our programming for the ultimate community. As far as we know, this is the first large indoor space in the world that is devoted to Ultimate Frisbee. Woohoo!


The RenFitness Gym is a safe and inclusive space for all people regardless of gender, race, sexual orientation, religion, age or ability. This is a place to work, play, and build community with others!

Get in the Gym

There are so many great ways to get into this gym! Let's hang out, friends!

Work Out


We have a number of ways you can access the gym equipment and our coaches, including:

  • Gym Access to come in and work out independently or with your friends
  • Group Classes led by our certified strength and conditioning coaches to help you achieve your goals
  • 8-Week Courses that follow the club ultimate season and give you an intensive workout plan
  • Specialized Personal Training and Movement Evaluations



Bring your team in here! We offer:

  • Facility Rentals
  • Custom Programming
  • On- and Off-Site Clinics
  • Fundraiser Opportunities


We offer specialized youth programming and prices including:

  • Discounted Gym Access and Rental Rates
  • Youth Events
  • Weekly High School Goalty

Rentals & Events

Our facility is available to rent for fundraisers, off-site retreats, birthday parties... whatever you can dream up!

We also run events including:

  • Leagues and Tournaments
  • Clinics, Workshops, and Seminars
  • Community Events & Parties

Health & Fitness Professionals

Our facility is open to licensed and insured health and fitness professionals to work from, including for:

  • Personal Training
  • Group Classes
  • Massage
  • Physical Therapy
  • Chiropractic Care

About RenFitness

RenFitness, LLC is a strength and conditioning team based in Seattle, established by Ren Caldwell. We’re passionate about creating programming, resources and providing education for ultimate frisbee players locally and around the world. Our goals are to reduce injury risk for field athletes, improve on-field performance, and give players the tools and knowledge they need to pursue their sport at whatever level they desire.

Contact Us


RenFitness Gym Ballard
1404 NW 49th Street
Seattle, WA 98107

About our team

Ren Caldwell, NSCA CSCS, FMS


Owner, Strength and Conditioning Coach

In the last few years, I’ve focused on providing high quality, sport-specific and innovative programming to the ultimate community. I’m committed to working with people to improve their movement patterns and safely load their bodies, especially young female athletes! I write a monthly training column for Skyd Magazine (which has worldwide readership), have released instructional videos through RISE UP, and have been flown around the country and the world to educate ultimate players and coaches. FUN FACT: I used to be a professional modern dancer!


Bert Abbott, NSCA CSCS

Team Programming Coordinator, Strength and Conditioning Coach

I recently made the switch from teaching secondary science to strength and conditioning coaching for ultimate players. As a long-time youth coach and a captain of Seattle Mixtape, I'm excited to work with the Seattle ultimate community in this new capacity. I'm interested in helping teams and individuals move their work in the gym and on the field from simply exercising to sport-specific training. 


Kira Morin, Basi Pilates Instructor

Business Manager, Core & Stabilization Coach

I have been playing recreational ultimate for 10 years and more competitively in the last couple years. I have always loved the spirit of the game and the community it brings. When I got injured (hip labral tear and annular tear in my spine) I turned to RenFitness and Pilates to avoid surgery and to get stronger. It worked! When I heard that Ren wanted to open a gym, I jumped at the opportunity to help in any way I could. I have a background as a Pilates Instructor and in Organizational Development. I like helping people be healthy and strong, and creating systems that help people and organizations be successful. With RenFitess I get to do all of that and get to work in a place that cultivate the ultimate community!