The swiss ball walk out is one of 36 core-strengthening exercises featured in Lesley Paterson’s 6-Minute 6-Pack video series. A two-time Xterra world champion and the 2012 ITU Cross world champion, Lesley developed the 6-Pack workouts with the pros at Rehab United Physical Therapy in San Diego. The result: a hard-hitting core workout that’s done in just six minutes.
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