Hi all, ive read a number of posts from folk here who have experienced knee problems at some point during the program. I did myself and found this link to be useful and my problem cleared real quick, and not come back
nhs.uk/Livewell/c25k/Pages/...
some of the exercises can be so simple and just done while making a cup of tea or any time when a few moments are available, the single leg squat i found helped me.