As much as possible apart from when i am ill! It all helps and also helps you build it into your life for after LT ... when i started lt i was training for the race for life.. so was running 3 times a week minimum never felt bad of it...listen to your body and do as much as you can.. If not cardio at least do some toning as it will help with muscle building/definition (the more muscle you have the more effective you are at losing weight) and toning helps with loose skin issues to ... after week one i would go for it hun!!!!!