My belief is that you’ve chosen a teacher to impart yoga to you. That choosing is subconscious and/or conscious. There are reasons for this choosing and they may be obvious or subtle, hidden or revealed. But they are there.
For this reason I ask and encourage students to begin this dialogue with their teacher. It is an important element which cultivates the required student-teacher relationship AND it reveals things to teacher about student and vice-versa.
Only when we meet the teaching process half-way in this fashion can we truly know the depth of what our chosen teacher has to offer. And, of course, this discernment is critical in remaining with a teacher of merit and moving on from a teacher who cannot meet your needs.
More directly, “power yoga” is a generic term and it does not (to me) reveal anything at all about the practice other than that it is fiery, quick, and warm. Without knowing what exactly you were doing in your sequence and in what way(s) you were doing I could not conjure a sound reply.
It is not a desired effect of asana to have pain in the location you outline. That having been said, when a student mindfully works the body and explores the unexplored (within themselves) then there can be discomfort. What you describe does not sound like discomfort but again without knowing the what’s and wherefores …
Warmly,
gordon