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2020 U Sports Champs

June 1 - Tip by Karen Gilbert Tyssen
Tip by: Karen Gilbert Tyssen

Active isolated stretching (AIS) is a technique which uses the bodies natural feedback loop to help relax and lengthen tight structures. AIS works by actively using the opposing muscle group to move the joint through its available range, forcing the tight or shortened tissue to relax. Performing active isolated stretching in restricted areas will prevent injury and improve performance by allowing the body to move freely through its available range of motion.

Karen Gilbert Tyssen

Karen Gilbert Tyssen
Registered Physiotherapist
London, Ontario


Karen Gilbert Tyssen is a Registered Physiotherapist who completed her Honours Kinesiology degree in 2005 at Western University, going on to complete her Masters of Physiotherapy from Western University in 2007.

Since graduating Karen has obtained advanced training in Orthopedics, Manual therapy, Acupuncture, Selective Functional Movement Assessment, Running Specific Injuries and Gait Assessment, and Neurological rehab including Bobath training.

Karen has been a distance runner since the age of 12, competing at the high school and club level, and is a Western University Cross Country and Track and Field Alumni. Karen has treated runners of all levels including those competing at the National and International level, including treating the Western Cross Country team and members of local track and distance clubs. Karen has a special passion for treating runners and continues to pursue advanced training to help them recover from injury and make a healthy and speedy return to the sport they love.

Karen works at Body Mechanics Physiotherapy in London and is available for appointment at

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