Dr. Jason Karp is an internationally-recognized running and fitness expert and owner of Run-Fit, LLC, providing coaching and educational services to runners and fitness professionals around the world. He is also the creator of the REVO₂LUTION RUNNING™ certification.

He has more than 200 articles published in running, coaching, and fitness magazines and scientific journals and is the author of seven books, including The Inner Runner, Running for Women, and Running a Marathon For Dummies.

Website: run-fit.com/

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