There are a few important points to remember when beginning the practice of Uddiyana Bandha: perform it only on an empty stomach, and only after an exhalation, never before an inhalation. (yogajournal.com)
Perform Uddiyana Bandha at the beginning of your asana practice to stimulate the energy resident in the belly. (yogajournal.com)
Because you should always perform Jalandhara Bandha along with Uddiyana Bandha, come into Jalandhara Bandha at this point. (yogajournal.com)