The Dalia Health Blog
Health, explained simply.
Straight answers about your heart rate, recovery, and nutrition — in plain language, with links to reputable sources.
Heart HealthFeatured
How Apps Calculate Your Biological Age (WHOOP, Oura, Garmin & Dalia)
WHOOP, Oura, Garmin, and Dalia all give you a "biological age" — but they calculate it in completely different ways, and none of them is the lab test Bryan Johnson uses. Here is what is really under the hood.
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The Best Calorie Tracking Apps, Ranked (2026)
MyFitnessPal, MacroFactor, Cronometer, Cal AI and more — compared on what actually matters: accuracy, database quality, how fast logging is, and price. Here is the honest ranking.
What Is a Good Resting Heart Rate?
For most adults, a healthy resting heart rate sits between 60 and 100 beats per minute. Here is what your number really means — and the trend that matters more than any single reading.
What Is HRV and Why Does It Matter?
HRV is the tiny variation in timing between your heartbeats — and one of the best everyday windows into stress, recovery, and how ready your body is to perform.
Why Is My Heart Rate High? Common Causes
From caffeine and stress to dehydration and illness, a fast heart rate usually has an everyday explanation. Here are the common causes — and the warning signs that mean you should get checked.
How Many Calories Should I Eat to Lose Weight?
There is no universal calorie target — it depends on your body and activity. Here is the simple, evidence-based way to estimate how much you should eat to lose weight at a healthy pace.
What Is a Calorie Deficit? A Simple Guide
A calorie deficit is the one thing every successful weight-loss approach has in common. Here is what it actually means, the simple math behind it, and how to create one without misery.