Yoga insanity

So I don't know if I picked a particularly challenging Yoga DVD from the library or what, but this stuff is crazy! So I based my selection off of reading user comments on Amazon.com, and this DVD was geared toward athletes so I thought it was perfect. Basically here is the scenario when I do this workout, I follow along for 9 minutes and then I can no longer even hold myself up anymore and have to stop. I think I may just do a section of the video per day since trying it all leaves me a quivering pile of mush. And who said yoga was relaxing? Oh my gosh no, at least not this DVD! We are going to try a more relaxing yoga next time, not one for athletes or toning or tightening anything....if that is a byproduct, fine but not as a main focus.