Clarifying what I think the take-away from @gibalam on zone 2 was: While it’s true that yo

Well SupportedThe largest reduction in all-cause mortality occurs when moving from the lowest fitness category to the next category.

Well SupportedZone 2 training allows for higher training volume compared to very high-intensity training due to lower physiological cost and reduced wear and tear.

Well SupportedExercise intensity matters for everyone, but the need for volume depends on specific performance goals.

Partially SupportedShorter exercise sessions should lean towards higher intensities, while longer sessions require a mix of intensities including Zone 2.

Partially Supported