If it's a 90s race then the effort is anaerobic. The rider is not clearing co2 from the blood.
Nobody actually races like this, so all cycling - because it required more than one short effort - is an endurance sport as it's commonly understood.
The body doesn't ever use only one energy pathway. However, one is dominant at any given time.
Cadence alone won't determine the effort so it's all moot.
@miro_o started
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If it's a 90s race then the effort is anaerobic. The rider is not clearing co2 from the blood.
Nobody actually races like this, so all cycling - because it required more than one short effort - is an endurance sport as it's commonly understood.