Blood oxygen on Apple Watch: Is it really useful for sleep apnea?

Apple Watch sleep apnea alerts use the accelerometer, not SpO2. Learn what blood oxygen can and cannot show at night, and which sleep metrics matter.

#apple-watch #sleep-apnea #blood-oxygen #sleep-tracking

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Longevity January 31, 2026

How biological age is calculated in SuperAge | complete guide

See how SuperAge calculates wearable-derived Fitness Age and separate PhenoAge and KDM estimates from blood tests, with current weights and limitations.

#biological-age #eta-biologica #how-to

Recovery January 29, 2026

Body energy: How to monitor your energy reserves on iPhone and Apple Watch

Discover how SuperAge's Body Energy monitors your body's battery on iPhone and Apple Watch. Learn to interpret energy levels and optimize recovery and performance.

#body-energy #hrv #recovery

Fitness January 29, 2026

Why climbing is the most complete workout (and anti-aging)

Discover how climbing combines grip strength, cardio, mobility, and mental focus for healthy aging, plus how to start safely and track progress.

#how-to #faq #arrampicata

Fitness January 29, 2026

Walking vs running: Which burns more fat? Science has the answer

Should you walk or run to lose weight? Discover what science says about the fat-burning zone, calories burned, and which activity to choose for your goals.

#how-to #faq #walking