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De meeste baseren zich standaard op de formule 220 - leeftijd. Stel je horloge in met je op het veld gemeten FCmax voor meer precisie.",{"type":37,"tag":46,"props":2019,"children":2020},{},[2021,2026,2029],{"type":37,"tag":90,"props":2022,"children":2023},{},[2024],{"type":43,"value":2025},"Zone 2 voelt echt te makkelijk aan — heeft dat wel nut?",{"type":37,"tag":199,"props":2027,"children":2028},{},[],{"type":43,"value":2030},"\nDat is de vraag die alle hardlopers zich stellen wanneer ze voor het eerst serieus in zone 2 trainen. Het antwoord is ja — op voorwaarde dat je geduldig bent. Mitochondriale aanpassingen hebben 6 tot 12 weken nodig om zich volledig te manifesteren. 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