I really like your idea Juran, I think I agree with a lot of what Povilas S has added as well.
I think I would approach the concept like this:
Certain challenges would be related to certain elements of the game. So, for example, going for a run while wearing your fitness tracker which is connected to the game could earn you points or regenerate your characters health, or even time in the game would not move forward until the player has gotten an x amount of sleep in real life (preventing people from playing for days without stopping) etc.
I would keep the challenges and the connected rewards set, as being able to challenge other players or having varying degrees of success when performing challenges might open too many variables that would need to be moderated and might make the system too complex.
So, in my interpretation, players would know that in order to achieve or gain certain things in the game, they would need to do certain things in real life. You could then also work in bonus rewards, for example, if a player goes for a 2k run for 3 days in a row and also logs into the game for the same 3 days, he/she might receive a special reward that can be used in the game. This way, the game promotes certain healthy habits while also encouraging people to play often. You could then effectively gamify any fitness goal by connecting it to something totally unrelated.
Please leave the feedback on this idea
Please leave the feedback on this idea