Todd Ellenbecker MS, PT, SCS, OCS, CSCS, USPTA is clinic director of Pysiotherapy Associates Scottsdale Sports Clinic, Scottsdale, AZ. Todd has over 20 years of experience using extremity systems, lectured around the world, and published papers on the topic.

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Ron Croce PhD is a professor of Kinesiology at the University of New Hampshire, Durham, NH. Ron has over 20 years of experience working with extremity systems in the research setting. He has published many articles on the topic andis a recognized expert coupling EMG and isokinetic resistance.

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John Hisamoto PT, ATC is Founder and President of PRO-ACTIVE Physical Therapy, Tampa, FL. And SPORTSWORKS, a Physical Therapy Education and Consulting company. John has over 20 years of experience designing and using extremity systems. He is a published author and lectures around the world on the topic.

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