Because I tend to get bored if I do the same work out every single day I like to mix things up a little bit.  Last week I was doing Yoga, and while it was okay I did not feel like I was being challenged enough.  I kept this in mind when I chose the type of workout that I wanted to try out this week and as a result ended up choosing something that would really challenge me.  The mma core strength program that I have been doing fits the bill as it has been kicking my butt and I am enjoying it so much that I will continue on with it for the foreseeable future.