I've just finished Wk5 r2. I did my 8x2 as per the plan. The first 8 mins was definitely easier than the second but I completed it which is the main thing.
Thing is r1 included 5 mins runs. R2 includes 8 mins runs - an increase of 40%. What I can't get my head around is the increase from 8 mins to 20 mins - over 100% increase.
Which leads me to the question, which is has anyone repeated r2 twice so as to prepare better for r3?