The VitalWhys Journal
Articles
Long-form pieces on longevity, training, sleep, and living deliberately. No fluff. Written for people who treat health like it matters.
zone 2
Heart Rate Zones by Age: The Complete Reference Table
All five heart rate training zones, calculated for every age from 20 to 70. Find your numbers, understand what each zone does, and know which one you should be spending most of your time in.
May 25, 2026 · 11 min read
zone 2
The Exact Zone 2 Heart Rate Formula for Your Age
Every trainer has a Zone 2 formula. Most of them are wrong for you specifically. Here's what the research actually says about how to find your aerobic threshold — and why fixed percentages mislead more people than they help.
May 4, 2026 · 10 min read