The (adult) ice hockey player is Bieke van Nes from The Netherlands, who has played professionally in Canada and the US and is currently the only female player in the top level Dutch ice hockey team Dordrecht Lions. The track and field sprinter is the Belgian athlete Seppe Thys, a national silver medallist. Both have dedicated their lives to their sport.
Both athletes were cast to portray a story of what it is to live a sporting life. To quote the voice-over: Endure, suffer, bleed, sweat, cry, die.