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RUN-2799

SAN MATEO COUNTY, CA - SEPTEMBER 1985: Mark Sisson trains on a path near Crystal Springs Reservoir in San Mateo County, California during September 1985. Sisson is an endurance athlete and author; he is the author of The Primal Blueprint. (Photo by David Madison/Getty Images) *** Local Caption *** Mark Sisson

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RUN-2799-HRM.jpg
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1985 David Madison
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3368x5000 / 1.8MB
www.davidmadison.com
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Mark Sisson
SAN MATEO COUNTY, CA - SEPTEMBER 1985: Mark Sisson trains on a path near Crystal Springs Reservoir in San Mateo County, California during September 1985. Sisson is an endurance athlete and author; he is the author of The Primal Blueprint. (Photo by David Madison/Getty Images) *** Local Caption *** Mark Sisson
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