I tend to do a 5 day rotation with CTX...Typically will do all of the upper body 2x's a week, lower body 2x's a week, and the cardio Monday through Friday...
One week I do upper (and abs) Monday and Thursday, lower Tuesday and Friday, the following week I switch...
For some reason I've always done abs with upper body...Don't ask why!!!
MJ in MN
PS It's time for me to get another set!!! Have had this one for a month now!!