Ren Caldwell

Ren Caldwell is a NSCA Certified Strength and Conditioning Specialist and an FMS-certified professional, focusing primarily on working with athletes (especially ultimate frisbee players) and people coming back from injuries. She has had the pleasure of doing strength and conditioning work with several elite teams - Seattle Rainmakers, Seattle Sockeye, and Seattle Riot - and is currently working with both University of Washington teams and several Seattle youth programs.

Testing 1, 2, 3… Benchmark Testing

by February 25, 2016, 7:30am 0

Teams need to know where they stand athletically, but figuring out what to test for and when to do it can be difficult. Ren Caldwell discusses the ins and outs of benchmark testing for ultimate players.

Testing, Testing, 1, 2, 3: Athletic Testing in Tryouts

by January 29, 2016, 11:57am 0

Combine-style athletic tests are becoming more popular at tryouts, but the data is only valuable if used correctly. Ren Caldwell breaks down the different types of tests and what they evaluate.

It’s Time to Coach the Coaches

by December 23, 2015, 6:40am 0

We have great strength & conditioning  resources for players, but not enough focus on helping coaches use it with teams. Ren has some ideas on how to change that but is calling on all coaches for feedback.


Hamstring Strains in Ultimate Players: Why It Happens and What To Do About It

by December 4, 2015, 6:00am 0

Evaluating hamstring injuries is a science, not rocket science.You can come back more powerful and injury-resistant, instead of more prone to doing the same damn thing next season. Cool, right?

Film Study: How’d They Do That?!

by October 22, 2015, 4:19pm 0

Watching ultimate highlight reels this year, I was fascinated by the seconds leading up to the “big moments,” the quality and kind of movements and positions required to create the situation where the best things can occur. I see these moments with the eyes of a strength & conditioning professional, and I know these plays don't happen without a good training program. Let's break down a few plays and demystify the movements that create them!


Meet Your Psoas, the Muscle at the Center of it All

by July 24, 2015, 9:28am 0

Your psoas is one of your body's biggest, most important muscles. Do you know how it works?

Building Athleticism in High School Players: The High Cost of Tournaments

by June 4, 2015, 11:43am 0

Ren explores the balance of developing youth players and risking injury at high impact tournaments.

On-Field Power Development – A Conversation with MC and Ren

by May 7, 2015, 10:56am 0

MC and Ren, a duo that's a driving force behind how players in Seattle are approaching training, chat about their approach to developing on-field power.

Group Strength Training for Ultimate

by April 16, 2015, 9:44am 0

Strength training is a must if you want to excel as a player, but lots of people struggle with lifting alone. One possible solution: join a training group!

Are You Overtraining?

by March 12, 2015, 10:33am 0

Of course you've gotta train if you want to reach your potential. But if you overdo it by ignoring recovery and workload, you're defeating the purpose.