Is 'Zone 2' the Magic Effort Level for Exercise?(nytimes.com)
nytimes.com
Is 'Zone 2' the Magic Effort Level for Exercise?
https://www.nytimes.com/2025/02/19/well/move/zone-2-exercise-benefits.html
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https://www.nytimes.com/2025/02/19/well/move/zone-2-exercise-benefits.html