YouCaps Journal — the science of wearables, recovery and personalized supplements, explained plainly.

The YouCaps Journal publishes articles on wearable data (sleep, recovery/HRV, activity), nutritional supplements and personalized nutrition. The editorial team keeps claims EFSA-compliant and avoids overpromising: "what the science says — and what it (still) doesn't." Published by YouCaps, KvK 95822623, Netherlands.

— Journal · YouCaps

The science,explained plainly.

What the data says about sleep, recovery and supplements — and what it (still) doesn't. No "boost", no "transformation". Mechanisms, sources and honest uncertainty.

All Recovery & HRV Sleep Ingredients Wearables Privacy & data
A wearable on a wrist at dawn, representing overnight HRV measurement
Recovery & HRV 17 June 2026 8 min read

What your HRV says about recovery

Your wearable shows a number every morning. What heart-rate variability actually measures, what moves it, and how to turn it into a decision instead of a stat you forget by lunch.

YouCaps Editorial

Recent articles

A smart ring and a hand at dawn
Sleep 28 June 2026

Reading your sleep data

What your wearable really tells you: HRV, the resting heart-rate curve, breathing, and the orthosomnia trap. With the studies.

A calm, dark bedroom at night
Sleep 28 June 2026

The biology of sleep

Four systems decide how deep you sleep: your clock and light, the glymphatic clean-up, adenosine and caffeine, and the temperature drop. With the studies.

A wearable at dawn representing overnight HRV and autonomic balance
Recovery & HRV 24 June 2026

HRV & autonomic balance

The physiology behind a falling HRV baseline, what genuinely has substantiation, and how your wearable data becomes a personalised monthly formula.

— More on the way

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