I have a question regarding the training speed of. I remember Chen Laoshi saying, that doing two slow and one fast (and then again two slow, one fast) would be good. But I am not sure about the context anymore. Here on Daqinshan the „group“ prefer to do fast Yilus (like 4:30 minutes), instead of slow ones (like 8 minutes).
What I would like to know is, if there is a certain method to train(like two slow – one fast) or if the speed is just depending on the circumstances (learning level, day`s form and so on).