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Energy, vitality & your habits

Source-cited explainers on what an Energy Age is, how the Vitality Score works, and how everyday habits move it. General wellness for adults — never medical advice.

• What Is an Energy Age? (And How to Estimate Yours Free)

  What an Energy Age is, how it compares to your real age, and how to find yours free in 60 seconds with a 0–100 Vitality Score. 18+, not medical advice.

• What Is a Vitality Score? How the 0–100 Number Works

  How the 0–100 Vitality Score is calculated: the five habits, each habit's point weight, and what the four bands mean. Transparent, 18+, not medical advice.

• Does Sleep Affect Your Energy? What the Guidelines Say

  How sleep affects your energy, what the guidelines say about adult sleep, and how many Vitality points reaching 7–8 hours can recover. 18+, not medical advice.

• Free Energy Age Calculator: How It Works and Why It's Private

  A free, no-sign-up Energy Age calculator: five habit answers become a Vitality Score and an Energy Age, scored in your browser. 18+, not medical advice.