- https://www.healthline.com/health/fitness-exercise/how-many-calories-do-i-burn-a-day#how-to-calculate
- https://github.com/hemantkamalakar/google_fit_hass
- https://www.c-sharpcorner.com/article/getting-started-with-google-fitness-rest-api-part-2/
- https://iprofile.wiley.com/iprofile/html/WhatIsMyActLevelPage.html