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Fischer Institute approaches physical therapy & performance from a total body, functional viewpoint. Our treatment includes hands-on manual therapy, patient-specific strength and flexibility programs and also injury prevention.  As with physical therapy, athletes that train at Fischer Institute can expect to train using sport specific strength & conditioning programs that help prepare the athlete for the demands of their sport.  

Our state-of-the-art facility offers patients & athletes the most up-to-date and effective physical therapy and sports performance techniques.  For more information regarding physical therapy or sports performance please visit or website at:


Located in Phoenix Arizona, Fischer Institute is a physical therapy and sports performance center known nationally and around the globe. makes it easy to manage your entire fitness business in one place from scheduling appointments and processing billing to completing client assessments and delivering workouts in your custom-branded apps.

Derin McMains MS, MA, CC-AASP, San Francisco Giants

McMains is currently the Peak Performance Coordinator for the San Francisco Giants.  His position as Peak Performance Coordinator with the Giants was a natural role for McMains, as he spent the 2008, '09, '10, '11 and '12 seasons as a coach and manager within the organization.  He was awarded three World Series Rings as a member of the player development staff in 2010, '12 and '14.  McMains played in the Giants organization from 2001 through 2008 before hanging up his cleats.

McMains received his Bachelors degree in Radio, Television and Film from the University of Arkansas at Little Rock in 2003, and went on to achieve his Masters in Sport and Exercise Psychology from the Arizona School of Professional Psychology at Argosy University in 2012.  In addition, he is a certified consultant within the Association of Applied Sport Psychology.

Prior to his current position with the Giants McMains was the Director of Mental Conditioning at the University of Notre Dame, Peak Performance Coordinator for the Seattle Mariners, and also currently works as a sport psychology consultant at the Fischer Institute preparing collegiate football players for the NFL Combine.


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