This pool is for Ring Fit Adventure posts that reference the characters, setting, or gameplay mechanics in some way.
Posts that merely show people exercising with the ring-con without a clear reference to the in-game setting do not qualify for the pool. For example, while the exercise in post #7646423 is one of the exercises in the game, the only elements explicitly linking it to the game are the ring-con and the leg strap, as the exercise can still be performed without the equipment.
On the other hand, post #4773143 shows a character cosplaying as the female Ring Fit Trainee while post #3683334 shows the Trainee's characteristic fiery hair and the symbol used for the Ab Guard, so both qualify for the pool.