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
fitness
Rucking: The Best Exercise You're Probably Not Doing
Walking with weight on your back sounds too simple to matter. The research and the military both say otherwise. Rucking builds strength, burns serious calories, improves cardiovascular fitness, and is easier on your joints than running. Here's why it deserves a spot in your routine.
May 3, 2026 · 6 min read
fitness
VO2 Max: The Single Number That Predicts How Long You'll Live
Forget cholesterol. Forget BMI. The strongest predictor of all-cause mortality isn't a blood marker — it's your cardiorespiratory fitness. Here's what VO2 max actually measures and why improving it might be the most important thing you do this year.
May 3, 2026 · 6 min read
fitness
Zone 2 Cardio: The Most Underrated Exercise Nobody Talks About
Every influencer is talking about HIIT, lifting heavy, and hitting PRs. Meanwhile, the most powerful longevity tool in exercise science barely gets a mention. Here's what Zone 2 cardio actually does — and why you should be doing it.
April 15, 2026 · 8 min read