“Individual Challenges” are small (from a couple of days to a couple of weeks) individual challenges that set the pace to the working week and help users get bonus charges ⚡️. Each user decides for himself whether to sign up for such challenges or not.
If you completed a workout within the dates of challenge and joined afterwards, the workout will be clocked in the challenge when you update the app. The reverse principle also works – if you entered a challenge, but made a workout retroactively (for the past day), it will be accepted in the challenge (workout has to be completed within the dates of the challenge).
Users cannot create and publish their own challenges in the app.