Support

Use this page for support requests, factual corrections, or broken-tool reports related to zone 2 cardio, sleep, lifting, and healthspan content.

Contact

Email jinnsim@icloud.com.

Useful details to send

• The tool or article URL
• Your input values if a calculator felt wrong
• The study, guideline, or source you think we should reference instead
• Your device and browser if the page did not render correctly

Medical note

LongevityLab is educational and does not replace care from a physician, sports medicine clinician, or registered dietitian.