Having the ability to toggle intermittent notifications (potentially with a user set time between them) that remind players to drink water, stretch, take a break, etc. would be really nice to have. Players will often disregard their health while playing games and forget to stay hydrated, or will play through pain caused by repetitive strain injuries. Notifications that pop up in an unintrisive way (when the player is not moving, or not in a run) could help reduce the severity of these issues.