Confusion during my spinning class (sorry; it's kind of long)

[Bluetree]

She's young and a little immature and, in my opinion, thinks she knows far more about cycling and training than she does. She turned me off early on because, ironically, on several instances, she criticized another instructor in front of the rest of the class. The criticism was not only unwarranted, but also unprofessional.

Unprofessional behavior towards a client or co-worker is never acceptable and should be reported to the employer immediately. Doesn't matter if it's a spinning instructor, sales clerk, manager, etc. If I was paying dues, I wouldn't have put up cr@p for a second. Just my 2¢.