Reminders to drink water
Set an interval and receive a prompt to drink water while you work. Intended for people who forget entirely rather than those who need a precise regime.
Forgetting is the actual problem for most desk workers. Thirst is a decent signal, but concentration reliably overrides it, and hours pass without noticing.
These are general wellbeing exercises, not medical advice. If you have a health condition, are recovering from injury, or find that an exercise causes pain rather than mild discomfort, speak to a qualified professional rather than working through it.
Every hour or so suits most people at a desk. Reminders that arrive too frequently get dismissed automatically and stop having any effect.
Only if you forget, which many desk workers do. Thirst is a reasonable signal in general, but concentration reliably suppresses noticing it.
Timing continues accurately in the background, though whether you see or hear the prompt depends on your browser's notification permissions.