ck1-: I certainly hope not - BodyBalance/Flow is ALL about hard work so the idea of choosing tracks which work you to the extreme sounds great!
I have to agree with thefitnessguy on this one. Extreme BB/BF simply doesn't compute.
I'm no fan of BF because so much of the essence of yoga has been lost in it.
You should be able to find personal satisfaction in each step of your journey, each pose.
Struggling is optional, but anyone going into the class looking for a struggle is missing the point. Why?
Because yoga is all mental. The physical is simply the environment in which the mental occurs. If the environment is extreme, then the mental can't occur. It would be like trying to rake leaves in a windstorm.
If you are looking for a challenge in meditation, try a different pose = lotus, half-lotus, simple sitting position.
Back off if it isn't fulfilling.
Rex
Excuse me... May I motivate you?