Is it just me or is Week 4 suddenly a *lot* tougher? I did my usual and headed out with Mr Ullrey on my headphones ready to run when he told me.. I didn't check the program in advance and wasn't prepared for 3 mins followed by 5 x2. I'm sure I'll manage but my knees took a battering and I'm wondering how next week will be... Does anyone know if the coolrunning C25K program - which Robert Ullrey's podcasts are designed around - has exactly the same structure as the NHS/Laura routine? I'm assuming so, but maybe Week 4 easier with Laura...?