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</script>https://sportschoolkreijtz.com/wp-content/uploads/2026/06/1B09D3BC-6F12-48F1-950F-5A65AE1A5AE9.jpg14401440WAAROM WATTAGE ZONES EN/OF HARTSLAG ZONES SOMS ZINLOOS ZIJN Vanmorgen pakte ik mijn fiets, omdat de zon scheen, zonder al te veel na te denken over de omstandigheden.Want die waren toch wat zwaarder dan ik dacht. Het was koud – er lag nog ijs in de tuin en in het park waar ik door fiets […]