Is it ok to do qigong for say an hour in the morning then an hour in the evening? That is, is it ok to do the qigong active exercise routine two or more times in the same day. Can you do too much?

If I want to do a two hour session of qigong should I go through all the active exercises only once or cycle through the whole routine a few times? What is best?

With EFT you can clear blockages in one minute flat but you have to frequently spend 30 minutes or more doing qigong to get the same effect. So why is it the more you do qigong and the longer you meditate the better it is for you?