It depends on what you are doing in the exercise. If it is just thinking and contemplating and going over your life there is nothing wrong with that. From the way you are explaining it, it doesn’t seem wrong. You can sit at home and have mental observations in your room.
It depends on what other traditions are. If they are contrary to our beliefs no. If it is telling you to have observations there is nothing wrong with that as long as you are fulfilling your religious duties and not doing something wrong.