Courtesy of Colin Hill, Qiandao Lake, Chun’an, China.

Colin Hill of Chillswimasked 2016 Olympic 10 km marathon swimming champions
Sharon van Rouwendaal and Ferry Weertman about their training and technique when they all gathered in in Qiandao Lake, Chun’an at the most recent FINA/HOSA Marathon Swim World Series event in China.

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