Two Levers Rule
In any progression cycle, pull intensity OR volume — never both. Pulling both invites catastrophic fatigue and injury.
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Ver reemplazadasIn any progression cycle, pull intensity OR volume — never both. Pulling both invites catastrophic fatigue and injury.
Fitness is gained DURING recovery, not during the workout. Insufficient rest between hard sessions = no adaptation, only fatigue.
Spending massive time at strict easy paces builds mitochondrial density, so baseline easy pace gets faster at the same heart rate.
~80% of weekly volume in strict Z1/Z2; ~20% in Z4/Z5. Avoid the Z3 'gray zone' that produces fatigue without proportional adaptation.
The body adapts to the EXACT stress imposed. To run 4:30/km, you must rehearse 4:30/km. Generic mileage doesn't transfer.