Training is processed every friday.
It doesn't matter how many times you change your training along the week, it only matters what training is set at the time the training is processed, on friday.
The weekly minutes each player played at the specified position of training determines if they're trained or not (48+ minutes at the trained position = 100% of training).
I suggest you read the rules though. All of it. You wouldn't be asking this question if you had read it.