caffeine
Exploring the Timing of Caffeine for Better Sleep and Recovery
Late‑day caffeine can push back sleep onset. Try a 10‑day self‑experiment to see if moving caffeine earlier improves your sleep and nightly HRV.
caffeine
Late‑day caffeine can push back sleep onset. Try a 10‑day self‑experiment to see if moving caffeine earlier improves your sleep and nightly HRV.
hrv
A 2026 Stanford sleep lab analysis found that night‑to‑night HRV variability outperforms average HRV for predicting daily stress. Here’s the science and a simple experiment you can run.