Well .... week 1, day 1 ticked off. I went in full of enthusiasm and started ok but half way through I could have just walked the rest but I kept with it but slowly. I felt I was plodding around but that is probably because I need to improve my technique (and fitness). My legs felt like lead but I did it and felt ok after. The next step is day 2 when I know what to expect but I will try.