How Much Zone 2 Exercise?
US guidance sets a weekly range for moderate activity, not a precise Zone 2 dose. Studies have not established an ideal Zone 2 amount for lifespan.
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Zone 2 & HIIT
How To Know If You’re in Zone 2
The simplest Zone 2 check is comfortable speech. Heart-rate formulas are rough; an exercise test can identify your own ventilatory threshold.
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Zone 2 Training for Longevity
Zone 2 is steady cardio just below the first lactate threshold. Moderate activity is linked to lower death rates; no trial shows Zone 2 beats other intensities.
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