block 1 base training zone for Ironman

Base training zone for Ironman, first 4 weeks prep training Z1 - RECOVERY 60-65%, easy pace, feels nice & light Z2 - Steady BASE TRAINING, 65-70% easy enough that you can still breath only through the nose Z3 - TEMPO, 75-80% of max effort, fairly hard but sustainable pace 60-90mins! Z4 - SUB threshold Z5a - SUPER threshold

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