Have only just heard about this and from what I can gather it is hardcore cardio.
I think this is the answer to getting rid of the extra stone on my middle.
Just wondered if anyone can advise, give any tips really. I realise that I need cardio, I can't run and also I need something that I can do at home whether the children are there or not (as in I can't get out of the house for walking etc. all of the time).