why do you back off the shuffling to 30 min? If Rex starts the fat eating at 21 min, only 9 minutes of fat burning. Even though you reduced your fat #’s, how is 8 minutes enough to maintain vs 40 min

The reality is, you can always do one of our 7 success strategies, which is, listen to your body. If you would like to shuffle for the full 60 min you are more than welcome to, and many days I personally do this myself just because I enjoy it. The only reason we say it is not mandatory is because if you have no fat to burn you have no fat to burn.