Yeah, I do find oblique crunches and top half pulses harder
This abs track, I do it also pretty easy for the first classes.
As for biceps, you should manage to do it with normal weights even if there are lots of singles. RMPfreak gave the trick and it works well. In fact, I workout more on that specific part in circuits, that may explain I manage to do it with normal weights and add a little more yesterday..
Another BP, BA, BC, BJ and RPM freak Fitness Show in Paris : 09/19-20/2009
http://animoto.com/play/0lmvNUk7jNu5XyBwnOiAIA
http://www.youtube.com/watch?v=cgv4bVJheBE