Blog
Sleep apnea: The silent condition that can accelerate biological aging
Untreated sleep apnea is linked to higher mortality risk and faster biological-aging signals. Learn the warning signs, how it damages your body at the cellular level, and evidence-based treatment options.
Training readiness score: How to know if your body is ready to train
Learn what a training readiness score is, how it's calculated from HRV, sleep, and recovery data, and how to use it to train smarter every day.
Body temperature and sleep: How the circadian curve controls your rest
Learn how body temperature shapes sleep, why the circadian cooling curve matters, and which room, bath, and light habits support deeper rest.
Chronotypes and longevity: Are night owls really dying sooner?
Learn how chronotype, sleep timing, and social jetlag affect longevity risk, why night owls are not doomed, and how to align sleep, light, and recovery.
Sleep debt: Can you actually pay it back? What science says
Is sleep debt real, and can you catch up on lost sleep? Learn what current research says about recovery sleep, weekend catch-up, health risk, and timing.
Training load curve: How to train smarter without overtraining
Learn what training load is, how the training load curve works, and how to use ATL, CTL, and TSB to optimize your workouts and prevent injuries.
Adenosine and sleep: The molecule that controls why you feel tired
Adenosine builds sleep pressure, caffeine masks fatigue, and aging can weaken sleep signaling. Learn habits for deeper sleep, recovery, and brain health.
Endogenous melatonin: Why your body's own sleep hormone matters more than any pill
How endogenous melatonin supports circadian timing, sleep and aging biology, plus evidence-informed ways to protect natural nighttime production.
Sleep duration and mortality: The U-curve nobody talks about
Sleeping too little OR too much raises mortality risk by up to 34%. Discover the U-curve of sleep duration, what 3 million participants reveal, and how to find your optimal range.